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Finding the Fourth Proportional to 1,230,149.40, 1,843,728 and 870,423.90

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Solution

The fourth proportional to 1,230,149.40, 1,843,728 and 870,423.90 is: 1,304,577.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230,149.40 : 1,843,728 = 870,423.90 : x
  2. Step 2: Convert to fraction form
    1,230,149.40/1,843,728 = 870,423.90/x
  3. Step 3: Cross multiply
    1,230,149.40x = 1,843,728 × 870,423.90
  4. Step 4: Simplify right side
    1,230,149.40x = 1,604,824,916,299.20
  5. Step 5: Solve for x
    x = 1,604,824,916,299.20/1,230,149.40
  6. Step 6: Final answer
    x = 1,304,577.25

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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.