Home / 390,772.20-586,158.30-141,421.80

Finding the Fourth Proportional to 390,772.20, 586,158.30 and 141,421.80

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Solution

The fourth proportional to 390,772.20, 586,158.30 and 141,421.80 is: 212,132.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,772.20 : 586,158.30 = 141,421.80 : x
  2. Step 2: Convert to fraction form
    390,772.20/586,158.30 = 141,421.80/x
  3. Step 3: Cross multiply
    390,772.20x = 586,158.30 × 141,421.80
  4. Step 4: Simplify right side
    390,772.20x = 82,895,561,870.94
  5. Step 5: Solve for x
    x = 82,895,561,870.94/390,772.20
  6. Step 6: Final answer
    x = 212,132.70

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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.