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Finding the Fourth Proportional to 993,444.80, 1,489,324.80 and 361,990.40

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Solution

The fourth proportional to 993,444.80, 1,489,324.80 and 361,990.40 is: 542,678.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    993,444.80 : 1,489,324.80 = 361,990.40 : x
  2. Step 2: Convert to fraction form
    993,444.80/1,489,324.80 = 361,990.40/x
  3. Step 3: Cross multiply
    993,444.80x = 1,489,324.80 × 361,990.40
  4. Step 4: Simplify right side
    993,444.80x = 539,121,280,081.92
  5. Step 5: Solve for x
    x = 539,121,280,081.92/993,444.80
  6. Step 6: Final answer
    x = 542,678.65

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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.