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Finding the Fourth Proportional to 686,502.40, 947,373.60 and 418,230.40

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Solution

The fourth proportional to 686,502.40, 947,373.60 and 418,230.40 is: 577,158.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,502.40 : 947,373.60 = 418,230.40 : x
  2. Step 2: Convert to fraction form
    686,502.40/947,373.60 = 418,230.40/x
  3. Step 3: Cross multiply
    686,502.40x = 947,373.60 × 418,230.40
  4. Step 4: Simplify right side
    686,502.40x = 396,220,439,677.44
  5. Step 5: Solve for x
    x = 396,220,439,677.44/686,502.40
  6. Step 6: Final answer
    x = 577,158.13

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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.