Home / 642,819.13-887,030.75-356,314.84

Finding the Fourth Proportional to 642,819.13, 887,030.75 and 356,314.84

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Solution

The fourth proportional to 642,819.13, 887,030.75 and 356,314.84 is: 491,681.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,819.13 : 887,030.75 = 356,314.84 : x
  2. Step 2: Convert to fraction form
    642,819.13/887,030.75 = 356,314.84/x
  3. Step 3: Cross multiply
    642,819.13x = 887,030.75 × 356,314.84
  4. Step 4: Simplify right side
    642,819.13x = 316,062,218,434.54
  5. Step 5: Solve for x
    x = 316,062,218,434.54/642,819.13
  6. Step 6: Final answer
    x = 491,681.42

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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.