Home / 656,117.20-984,175.80-212,885.20

Finding the Fourth Proportional to 656,117.20, 984,175.80 and 212,885.20

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Solution

The fourth proportional to 656,117.20, 984,175.80 and 212,885.20 is: 319,327.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,117.20 : 984,175.80 = 212,885.20 : x
  2. Step 2: Convert to fraction form
    656,117.20/984,175.80 = 212,885.20/x
  3. Step 3: Cross multiply
    656,117.20x = 984,175.80 × 212,885.20
  4. Step 4: Simplify right side
    656,117.20x = 209,516,462,018.16
  5. Step 5: Solve for x
    x = 209,516,462,018.16/656,117.20
  6. Step 6: Final answer
    x = 319,327.80

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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.