Home / 642,931.12-887,243.48-356,443.84

Finding the Fourth Proportional to 642,931.12, 887,243.48 and 356,443.84

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Solution

The fourth proportional to 642,931.12, 887,243.48 and 356,443.84 is: 491,891.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,931.12 : 887,243.48 = 356,443.84 : x
  2. Step 2: Convert to fraction form
    642,931.12/887,243.48 = 356,443.84/x
  3. Step 3: Cross multiply
    642,931.12x = 887,243.48 × 356,443.84
  4. Step 4: Simplify right side
    642,931.12x = 316,252,473,026.16
  5. Step 5: Solve for x
    x = 316,252,473,026.16/642,931.12
  6. Step 6: Final answer
    x = 491,891.69

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Double scale
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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.