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Finding the Fourth Proportional to 714,249.52, 985,676.31 and 391,989.60

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Solution

The fourth proportional to 714,249.52, 985,676.31 and 391,989.60 is: 540,952.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,249.52 : 985,676.31 = 391,989.60 : x
  2. Step 2: Convert to fraction form
    714,249.52/985,676.31 = 391,989.60/x
  3. Step 3: Cross multiply
    714,249.52x = 985,676.31 × 391,989.60
  4. Step 4: Simplify right side
    714,249.52x = 386,374,862,486.38
  5. Step 5: Solve for x
    x = 386,374,862,486.38/714,249.52
  6. Step 6: Final answer
    x = 540,952.22

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1.5x scale

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.