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Finding the Fourth Proportional to 545,419.53, 752,744.97 and 312,931.59

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Solution

The fourth proportional to 545,419.53, 752,744.97 and 312,931.59 is: 431,883.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,419.53 : 752,744.97 = 312,931.59 : x
  2. Step 2: Convert to fraction form
    545,419.53/752,744.97 = 312,931.59/x
  3. Step 3: Cross multiply
    545,419.53x = 752,744.97 × 312,931.59
  4. Step 4: Simplify right side
    545,419.53x = 235,557,680,326.60
  5. Step 5: Solve for x
    x = 235,557,680,326.60/545,419.53
  6. Step 6: Final answer
    x = 431,883.47

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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.