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Finding the Fourth Proportional to 520,813.79, 781,215.11 and 395,225.52

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Solution

The fourth proportional to 520,813.79, 781,215.11 and 395,225.52 is: 592,834.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,813.79 : 781,215.11 = 395,225.52 : x
  2. Step 2: Convert to fraction form
    520,813.79/781,215.11 = 395,225.52/x
  3. Step 3: Cross multiply
    520,813.79x = 781,215.11 × 395,225.52
  4. Step 4: Simplify right side
    520,813.79x = 308,756,148,081.61
  5. Step 5: Solve for x
    x = 308,756,148,081.61/520,813.79
  6. Step 6: Final answer
    x = 592,834.05

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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.