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Finding the Fourth Proportional to 686,975.13, 948,493.26 and 428,952.87

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Solution

The fourth proportional to 686,975.13, 948,493.26 and 428,952.87 is: 592,246.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,975.13 : 948,493.26 = 428,952.87 : x
  2. Step 2: Convert to fraction form
    686,975.13/948,493.26 = 428,952.87/x
  3. Step 3: Cross multiply
    686,975.13x = 948,493.26 × 428,952.87
  4. Step 4: Simplify right side
    686,975.13x = 406,858,906,052.66
  5. Step 5: Solve for x
    x = 406,858,906,052.66/686,975.13
  6. Step 6: Final answer
    x = 592,246.92

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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.