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Finding the Fourth Proportional to 656,871.40, 985,307.10 and 550,583.20

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Solution

The fourth proportional to 656,871.40, 985,307.10 and 550,583.20 is: 825,874.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,871.40 : 985,307.10 = 550,583.20 : x
  2. Step 2: Convert to fraction form
    656,871.40/985,307.10 = 550,583.20/x
  3. Step 3: Cross multiply
    656,871.40x = 985,307.10 × 550,583.20
  4. Step 4: Simplify right side
    656,871.40x = 542,493,536,100.72
  5. Step 5: Solve for x
    x = 542,493,536,100.72/656,871.40
  6. Step 6: Final answer
    x = 825,874.80

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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.