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Finding the Fourth Proportional to 545,765.76, 753,105.60 and 402,605.28

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Solution

The fourth proportional to 545,765.76, 753,105.60 and 402,605.28 is: 555,557.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,765.76 : 753,105.60 = 402,605.28 : x
  2. Step 2: Convert to fraction form
    545,765.76/753,105.60 = 402,605.28/x
  3. Step 3: Cross multiply
    545,765.76x = 753,105.60 × 402,605.28
  4. Step 4: Simplify right side
    545,765.76x = 303,204,290,957.57
  5. Step 5: Solve for x
    x = 303,204,290,957.57/545,765.76
  6. Step 6: Final answer
    x = 555,557.55

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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.