Home / 426,555.18-639,340.66-160,145.78

Finding the Fourth Proportional to 426,555.18, 639,340.66 and 160,145.78

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Solution

The fourth proportional to 426,555.18, 639,340.66 and 160,145.78 is: 240,033.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,555.18 : 639,340.66 = 160,145.78 : x
  2. Step 2: Convert to fraction form
    426,555.18/639,340.66 = 160,145.78/x
  3. Step 3: Cross multiply
    426,555.18x = 639,340.66 × 160,145.78
  4. Step 4: Simplify right side
    426,555.18x = 102,387,708,681.42
  5. Step 5: Solve for x
    x = 102,387,708,681.42/426,555.18
  6. Step 6: Final answer
    x = 240,033.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.