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Finding the Fourth Proportional to 520,894.80, 781,385.40 and 165,898.80

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Solution

The fourth proportional to 520,894.80, 781,385.40 and 165,898.80 is: 248,861.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,894.80 : 781,385.40 = 165,898.80 : x
  2. Step 2: Convert to fraction form
    520,894.80/781,385.40 = 165,898.80/x
  3. Step 3: Cross multiply
    520,894.80x = 781,385.40 × 165,898.80
  4. Step 4: Simplify right side
    520,894.80x = 129,630,900,197.52
  5. Step 5: Solve for x
    x = 129,630,900,197.52/520,894.80
  6. Step 6: Final answer
    x = 248,861.96

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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.