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Finding the Fourth Proportional to 710,276.68, 980,165.49 and 387,988.21

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Solution

The fourth proportional to 710,276.68, 980,165.49 and 387,988.21 is: 535,414.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,276.68 : 980,165.49 = 387,988.21 : x
  2. Step 2: Convert to fraction form
    710,276.68/980,165.49 = 387,988.21/x
  3. Step 3: Cross multiply
    710,276.68x = 980,165.49 × 387,988.21
  4. Step 4: Simplify right side
    710,276.68x = 380,292,653,968.87
  5. Step 5: Solve for x
    x = 380,292,653,968.87/710,276.68
  6. Step 6: Final answer
    x = 535,414.81

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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.