Home / 642,938.56-887,241.52-370,985.12

Finding the Fourth Proportional to 642,938.56, 887,241.52 and 370,985.12

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Solution

The fourth proportional to 642,938.56, 887,241.52 and 370,985.12 is: 511,951.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,938.56 : 887,241.52 = 370,985.12 : x
  2. Step 2: Convert to fraction form
    642,938.56/887,241.52 = 370,985.12/x
  3. Step 3: Cross multiply
    642,938.56x = 887,241.52 × 370,985.12
  4. Step 4: Simplify right side
    642,938.56x = 329,153,401,766.18
  5. Step 5: Solve for x
    x = 329,153,401,766.18/642,938.56
  6. Step 6: Final answer
    x = 511,951.56

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.