Home / 642,915.84-887,227.20-370,995.12

Finding the Fourth Proportional to 642,915.84, 887,227.20 and 370,995.12

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Solution

The fourth proportional to 642,915.84, 887,227.20 and 370,995.12 is: 511,975.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,915.84 : 887,227.20 = 370,995.12 : x
  2. Step 2: Convert to fraction form
    642,915.84/887,227.20 = 370,995.12/x
  3. Step 3: Cross multiply
    642,915.84x = 887,227.20 × 370,995.12
  4. Step 4: Simplify right side
    642,915.84x = 329,156,961,531.26
  5. Step 5: Solve for x
    x = 329,156,961,531.26/642,915.84
  6. Step 6: Final answer
    x = 511,975.19

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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.