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Finding the Fourth Proportional to 670,057.02, 924,894.18 and 428,988.87

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Solution

The fourth proportional to 670,057.02, 924,894.18 and 428,988.87 is: 592,142.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,057.02 : 924,894.18 = 428,988.87 : x
  2. Step 2: Convert to fraction form
    670,057.02/924,894.18 = 428,988.87/x
  3. Step 3: Cross multiply
    670,057.02x = 924,894.18 × 428,988.87
  4. Step 4: Simplify right side
    670,057.02x = 396,769,309,147.78
  5. Step 5: Solve for x
    x = 396,769,309,147.78/670,057.02
  6. Step 6: Final answer
    x = 592,142.60

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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.