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Finding the Fourth Proportional to 662,967.40, 994,451.10 and 289,719.40

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Solution

The fourth proportional to 662,967.40, 994,451.10 and 289,719.40 is: 434,579.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,967.40 : 994,451.10 = 289,719.40 : x
  2. Step 2: Convert to fraction form
    662,967.40/994,451.10 = 289,719.40/x
  3. Step 3: Cross multiply
    662,967.40x = 994,451.10 × 289,719.40
  4. Step 4: Simplify right side
    662,967.40x = 288,111,776,021.34
  5. Step 5: Solve for x
    x = 288,111,776,021.34/662,967.40
  6. Step 6: Final answer
    x = 434,579.10

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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.