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Finding the Fourth Proportional to 885,737.20, 1,328,605.80 and 862,409.20

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Solution

The fourth proportional to 885,737.20, 1,328,605.80 and 862,409.20 is: 1,293,613.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,737.20 : 1,328,605.80 = 862,409.20 : x
  2. Step 2: Convert to fraction form
    885,737.20/1,328,605.80 = 862,409.20/x
  3. Step 3: Cross multiply
    885,737.20x = 1,328,605.80 × 862,409.20
  4. Step 4: Simplify right side
    885,737.20x = 1,145,801,865,093.36
  5. Step 5: Solve for x
    x = 1,145,801,865,093.36/885,737.20
  6. Step 6: Final answer
    x = 1,293,613.80

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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.