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Finding the Fourth Proportional to 737,509.80, 1,105,487.10 and 421,285.80

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Solution

The fourth proportional to 737,509.80, 1,105,487.10 and 421,285.80 is: 631,484.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    737,509.80 : 1,105,487.10 = 421,285.80 : x
  2. Step 2: Convert to fraction form
    737,509.80/1,105,487.10 = 421,285.80/x
  3. Step 3: Cross multiply
    737,509.80x = 1,105,487.10 × 421,285.80
  4. Step 4: Simplify right side
    737,509.80x = 465,726,017,313.18
  5. Step 5: Solve for x
    x = 465,726,017,313.18/737,509.80
  6. Step 6: Final answer
    x = 631,484.51

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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.