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Finding the Fourth Proportional to 654,461.60, 981,692.40 and 643,402.40

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Solution

The fourth proportional to 654,461.60, 981,692.40 and 643,402.40 is: 965,103.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,461.60 : 981,692.40 = 643,402.40 : x
  2. Step 2: Convert to fraction form
    654,461.60/981,692.40 = 643,402.40/x
  3. Step 3: Cross multiply
    654,461.60x = 981,692.40 × 643,402.40
  4. Step 4: Simplify right side
    654,461.60x = 631,623,246,221.76
  5. Step 5: Solve for x
    x = 631,623,246,221.76/654,461.60
  6. Step 6: Final answer
    x = 965,103.60

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.