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Finding the Fourth Proportional to 520,098.15, 780,147.23 and 340,472.55

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Solution

The fourth proportional to 520,098.15, 780,147.23 and 340,472.55 is: 510,708.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,098.15 : 780,147.23 = 340,472.55 : x
  2. Step 2: Convert to fraction form
    520,098.15/780,147.23 = 340,472.55/x
  3. Step 3: Cross multiply
    520,098.15x = 780,147.23 × 340,472.55
  4. Step 4: Simplify right side
    520,098.15x = 265,618,715,071.17
  5. Step 5: Solve for x
    x = 265,618,715,071.17/520,098.15
  6. Step 6: Final answer
    x = 510,708.83

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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.