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Finding the Fourth Proportional to 218,612.34, 327,869.30 and 142,686.98

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Solution

The fourth proportional to 218,612.34, 327,869.30 and 142,686.98 is: 213,998.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,612.34 : 327,869.30 = 142,686.98 : x
  2. Step 2: Convert to fraction form
    218,612.34/327,869.30 = 142,686.98/x
  3. Step 3: Cross multiply
    218,612.34x = 327,869.30 × 142,686.98
  4. Step 4: Simplify right side
    218,612.34x = 46,782,680,251.71
  5. Step 5: Solve for x
    x = 46,782,680,251.71/218,612.34
  6. Step 6: Final answer
    x = 213,998.35

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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.