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Finding the Fourth Proportional to 520,925.80, 780,377.64 and 383,900.04

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Solution

The fourth proportional to 520,925.80, 780,377.64 and 383,900.04 is: 575,104.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,925.80 : 780,377.64 = 383,900.04 : x
  2. Step 2: Convert to fraction form
    520,925.80/780,377.64 = 383,900.04/x
  3. Step 3: Cross multiply
    520,925.80x = 780,377.64 × 383,900.04
  4. Step 4: Simplify right side
    520,925.80x = 299,587,007,211.11
  5. Step 5: Solve for x
    x = 299,587,007,211.11/520,925.80
  6. Step 6: Final answer
    x = 575,104.95

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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.