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Finding the Fourth Proportional to 573,013.20, 860,437.80 and 455,660.40

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Solution

The fourth proportional to 573,013.20, 860,437.80 and 455,660.40 is: 684,220.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,013.20 : 860,437.80 = 455,660.40 : x
  2. Step 2: Convert to fraction form
    573,013.20/860,437.80 = 455,660.40/x
  3. Step 3: Cross multiply
    573,013.20x = 860,437.80 × 455,660.40
  4. Step 4: Simplify right side
    573,013.20x = 392,067,432,123.12
  5. Step 5: Solve for x
    x = 392,067,432,123.12/573,013.20
  6. Step 6: Final answer
    x = 684,220.59

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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.