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Finding the Fourth Proportional to 710,253.75, 980,144.37 and 387,963.93

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Solution

The fourth proportional to 710,253.75, 980,144.37 and 387,963.93 is: 535,387.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,253.75 : 980,144.37 = 387,963.93 : x
  2. Step 2: Convert to fraction form
    710,253.75/980,144.37 = 387,963.93/x
  3. Step 3: Cross multiply
    710,253.75x = 980,144.37 × 387,963.93
  4. Step 4: Simplify right side
    710,253.75x = 380,260,661,752.57
  5. Step 5: Solve for x
    x = 380,260,661,752.57/710,253.75
  6. Step 6: Final answer
    x = 535,387.05

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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.