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Finding the Fourth Proportional to 642,915.54, 887,244.48 and 356,462.28

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Solution

The fourth proportional to 642,915.54, 887,244.48 and 356,462.28 is: 491,929.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,915.54 : 887,244.48 = 356,462.28 : x
  2. Step 2: Convert to fraction form
    642,915.54/887,244.48 = 356,462.28/x
  3. Step 3: Cross multiply
    642,915.54x = 887,244.48 × 356,462.28
  4. Step 4: Simplify right side
    642,915.54x = 316,269,190,258.21
  5. Step 5: Solve for x
    x = 316,269,190,258.21/642,915.54
  6. Step 6: Final answer
    x = 491,929.61

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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.