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Finding the Fourth Proportional to 218,725.70, 328,088.55 and 52,513.70

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Solution

The fourth proportional to 218,725.70, 328,088.55 and 52,513.70 is: 78,770.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,725.70 : 328,088.55 = 52,513.70 : x
  2. Step 2: Convert to fraction form
    218,725.70/328,088.55 = 52,513.70/x
  3. Step 3: Cross multiply
    218,725.70x = 328,088.55 × 52,513.70
  4. Step 4: Simplify right side
    218,725.70x = 17,229,143,688.14
  5. Step 5: Solve for x
    x = 17,229,143,688.14/218,725.70
  6. Step 6: Final answer
    x = 78,770.55

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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.