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Finding the Fourth Proportional to 526,780.20, 790,170.30 and 260,581.80

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Solution

The fourth proportional to 526,780.20, 790,170.30 and 260,581.80 is: 390,872.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,780.20 : 790,170.30 = 260,581.80 : x
  2. Step 2: Convert to fraction form
    526,780.20/790,170.30 = 260,581.80/x
  3. Step 3: Cross multiply
    526,780.20x = 790,170.30 × 260,581.80
  4. Step 4: Simplify right side
    526,780.20x = 205,903,999,080.54
  5. Step 5: Solve for x
    x = 205,903,999,080.54/526,780.20
  6. Step 6: Final answer
    x = 390,872.70

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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.