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Finding the Fourth Proportional to 656,521.70, 984,782.55 and 213,289.70

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Solution

The fourth proportional to 656,521.70, 984,782.55 and 213,289.70 is: 319,934.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,521.70 : 984,782.55 = 213,289.70 : x
  2. Step 2: Convert to fraction form
    656,521.70/984,782.55 = 213,289.70/x
  3. Step 3: Cross multiply
    656,521.70x = 984,782.55 × 213,289.70
  4. Step 4: Simplify right side
    656,521.70x = 210,043,974,654.74
  5. Step 5: Solve for x
    x = 210,043,974,654.74/656,521.70
  6. Step 6: Final answer
    x = 319,934.55

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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.