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Finding the Fourth Proportional to 641,958.13, 885,901.65 and 355,478.20

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Solution

The fourth proportional to 641,958.13, 885,901.65 and 355,478.20 is: 490,559.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,958.13 : 885,901.65 = 355,478.20 : x
  2. Step 2: Convert to fraction form
    641,958.13/885,901.65 = 355,478.20/x
  3. Step 3: Cross multiply
    641,958.13x = 885,901.65 × 355,478.20
  4. Step 4: Simplify right side
    641,958.13x = 314,918,719,489.52
  5. Step 5: Solve for x
    x = 314,918,719,489.52/641,958.13
  6. Step 6: Final answer
    x = 490,559.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.