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Finding the Fourth Proportional to 516,971.25, 775,512.50 and 217,482.30

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Solution

The fourth proportional to 516,971.25, 775,512.50 and 217,482.30 is: 326,246.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,971.25 : 775,512.50 = 217,482.30 : x
  2. Step 2: Convert to fraction form
    516,971.25/775,512.50 = 217,482.30/x
  3. Step 3: Cross multiply
    516,971.25x = 775,512.50 × 217,482.30
  4. Step 4: Simplify right side
    516,971.25x = 168,660,241,091.34
  5. Step 5: Solve for x
    x = 168,660,241,091.34/516,971.25
  6. Step 6: Final answer
    x = 326,246.85

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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.