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Finding the Fourth Proportional to 656,510.70, 984,766.05 and 213,278.70

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Solution

The fourth proportional to 656,510.70, 984,766.05 and 213,278.70 is: 319,918.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,510.70 : 984,766.05 = 213,278.70 : x
  2. Step 2: Convert to fraction form
    656,510.70/984,766.05 = 213,278.70/x
  3. Step 3: Cross multiply
    656,510.70x = 984,766.05 × 213,278.70
  4. Step 4: Simplify right side
    656,510.70x = 210,029,622,948.14
  5. Step 5: Solve for x
    x = 210,029,622,948.14/656,510.70
  6. Step 6: Final answer
    x = 319,918.05

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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.