Home / 642,187.38-886,218.59-355,726.02

Finding the Fourth Proportional to 642,187.38, 886,218.59 and 355,726.02

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Solution

The fourth proportional to 642,187.38, 886,218.59 and 355,726.02 is: 490,901.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,187.38 : 886,218.59 = 355,726.02 : x
  2. Step 2: Convert to fraction form
    642,187.38/886,218.59 = 355,726.02/x
  3. Step 3: Cross multiply
    642,187.38x = 886,218.59 × 355,726.02
  4. Step 4: Simplify right side
    642,187.38x = 315,251,011,870.71
  5. Step 5: Solve for x
    x = 315,251,011,870.71/642,187.38
  6. Step 6: Final answer
    x = 490,901.91

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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.