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Finding the Fourth Proportional to 619,121.70, 928,682.55 and 478,980.90

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Solution

The fourth proportional to 619,121.70, 928,682.55 and 478,980.90 is: 718,471.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,121.70 : 928,682.55 = 478,980.90 : x
  2. Step 2: Convert to fraction form
    619,121.70/928,682.55 = 478,980.90/x
  3. Step 3: Cross multiply
    619,121.70x = 928,682.55 × 478,980.90
  4. Step 4: Simplify right side
    619,121.70x = 444,821,203,613.30
  5. Step 5: Solve for x
    x = 444,821,203,613.30/619,121.70
  6. Step 6: Final answer
    x = 718,471.35

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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.