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Finding the Fourth Proportional to 545,355.18, 750,921.03 and 543,780.54

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Solution

The fourth proportional to 545,355.18, 750,921.03 and 543,780.54 is: 748,752.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,355.18 : 750,921.03 = 543,780.54 : x
  2. Step 2: Convert to fraction form
    545,355.18/750,921.03 = 543,780.54/x
  3. Step 3: Cross multiply
    545,355.18x = 750,921.03 × 543,780.54
  4. Step 4: Simplify right side
    545,355.18x = 408,336,243,190.76
  5. Step 5: Solve for x
    x = 408,336,243,190.76/545,355.18
  6. Step 6: Final answer
    x = 748,752.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.