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Finding the Fourth Proportional to 664,210.40, 996,315.60 and 309,916.40

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Solution

The fourth proportional to 664,210.40, 996,315.60 and 309,916.40 is: 464,874.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,210.40 : 996,315.60 = 309,916.40 : x
  2. Step 2: Convert to fraction form
    664,210.40/996,315.60 = 309,916.40/x
  3. Step 3: Cross multiply
    664,210.40x = 996,315.60 × 309,916.40
  4. Step 4: Simplify right side
    664,210.40x = 308,774,544,015.84
  5. Step 5: Solve for x
    x = 308,774,544,015.84/664,210.40
  6. Step 6: Final answer
    x = 464,874.60

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Double scale
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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.