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Finding the Fourth Proportional to 664,581.40, 996,872.10 and 310,287.40

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Solution

The fourth proportional to 664,581.40, 996,872.10 and 310,287.40 is: 465,431.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,581.40 : 996,872.10 = 310,287.40 : x
  2. Step 2: Convert to fraction form
    664,581.40/996,872.10 = 310,287.40/x
  3. Step 3: Cross multiply
    664,581.40x = 996,872.10 × 310,287.40
  4. Step 4: Simplify right side
    664,581.40x = 309,316,852,041.54
  5. Step 5: Solve for x
    x = 309,316,852,041.54/664,581.40
  6. Step 6: Final answer
    x = 465,431.10

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Half scale
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Double scale
Find fourth proportional to 664,582.40, 996,873.60 and 310,288.40
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.