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Finding the Fourth Proportional to 993,374.80, 1,489,219.80 and 361,920.40

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Solution

The fourth proportional to 993,374.80, 1,489,219.80 and 361,920.40 is: 542,573.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    993,374.80 : 1,489,219.80 = 361,920.40 : x
  2. Step 2: Convert to fraction form
    993,374.80/1,489,219.80 = 361,920.40/x
  3. Step 3: Cross multiply
    993,374.80x = 1,489,219.80 × 361,920.40
  4. Step 4: Simplify right side
    993,374.80x = 538,979,025,703.92
  5. Step 5: Solve for x
    x = 538,979,025,703.92/993,374.80
  6. Step 6: Final answer
    x = 542,573.68

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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.