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Finding the Fourth Proportional to 472,076.70, 708,115.05 and 425,420.70

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Solution

The fourth proportional to 472,076.70, 708,115.05 and 425,420.70 is: 638,131.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,076.70 : 708,115.05 = 425,420.70 : x
  2. Step 2: Convert to fraction form
    472,076.70/708,115.05 = 425,420.70/x
  3. Step 3: Cross multiply
    472,076.70x = 708,115.05 × 425,420.70
  4. Step 4: Simplify right side
    472,076.70x = 301,246,800,251.54
  5. Step 5: Solve for x
    x = 301,246,800,251.54/472,076.70
  6. Step 6: Final answer
    x = 638,131.05

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Similar ratio
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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.