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Finding the Fourth Proportional to 545,432.18, 752,453.49 and 318,977.78

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Solution

The fourth proportional to 545,432.18, 752,453.49 and 318,977.78 is: 440,047.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,432.18 : 752,453.49 = 318,977.78 : x
  2. Step 2: Convert to fraction form
    545,432.18/752,453.49 = 318,977.78/x
  3. Step 3: Cross multiply
    545,432.18x = 752,453.49 × 318,977.78
  4. Step 4: Simplify right side
    545,432.18x = 240,015,943,793.45
  5. Step 5: Solve for x
    x = 240,015,943,793.45/545,432.18
  6. Step 6: Final answer
    x = 440,047.27

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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.