Home / 420,780.60-580,681.85-229,799.61

Finding the Fourth Proportional to 420,780.60, 580,681.85 and 229,799.61

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Solution

The fourth proportional to 420,780.60, 580,681.85 and 229,799.61 is: 317,125.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,780.60 : 580,681.85 = 229,799.61 : x
  2. Step 2: Convert to fraction form
    420,780.60/580,681.85 = 229,799.61/x
  3. Step 3: Cross multiply
    420,780.60x = 580,681.85 × 229,799.61
  4. Step 4: Simplify right side
    420,780.60x = 133,440,461,515.08
  5. Step 5: Solve for x
    x = 133,440,461,515.08/420,780.60
  6. Step 6: Final answer
    x = 317,125.98

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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.