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Finding the Fourth Proportional to 520,898.40, 781,201.80 and 166,021.20

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Solution

The fourth proportional to 520,898.40, 781,201.80 and 166,021.20 is: 248,985.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,898.40 : 781,201.80 = 166,021.20 : x
  2. Step 2: Convert to fraction form
    520,898.40/781,201.80 = 166,021.20/x
  3. Step 3: Cross multiply
    520,898.40x = 781,201.80 × 166,021.20
  4. Step 4: Simplify right side
    520,898.40x = 129,696,060,278.16
  5. Step 5: Solve for x
    x = 129,696,060,278.16/520,898.40
  6. Step 6: Final answer
    x = 248,985.33

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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.