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Finding the Fourth Proportional to 714,854.55, 986,469.72 and 388,154.79

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Solution

The fourth proportional to 714,854.55, 986,469.72 and 388,154.79 is: 535,637.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,854.55 : 986,469.72 = 388,154.79 : x
  2. Step 2: Convert to fraction form
    714,854.55/986,469.72 = 388,154.79/x
  3. Step 3: Cross multiply
    714,854.55x = 986,469.72 × 388,154.79
  4. Step 4: Simplify right side
    714,854.55x = 382,902,947,007.96
  5. Step 5: Solve for x
    x = 382,902,947,007.96/714,854.55
  6. Step 6: Final answer
    x = 535,637.56

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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.