Home / 642,853.76-887,056.16-356,371.20

Finding the Fourth Proportional to 642,853.76, 887,056.16 and 356,371.20

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Solution

The fourth proportional to 642,853.76, 887,056.16 and 356,371.20 is: 491,746.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,853.76 : 887,056.16 = 356,371.20 : x
  2. Step 2: Convert to fraction form
    642,853.76/887,056.16 = 356,371.20/x
  3. Step 3: Cross multiply
    642,853.76x = 887,056.16 × 356,371.20
  4. Step 4: Simplify right side
    642,853.76x = 316,121,268,206.59
  5. Step 5: Solve for x
    x = 316,121,268,206.59/642,853.76
  6. Step 6: Final answer
    x = 491,746.78

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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.