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Finding the Fourth Proportional to 472,079.70, 708,119.55 and 425,423.70

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Solution

The fourth proportional to 472,079.70, 708,119.55 and 425,423.70 is: 638,135.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,079.70 : 708,119.55 = 425,423.70 : x
  2. Step 2: Convert to fraction form
    472,079.70/708,119.55 = 425,423.70/x
  3. Step 3: Cross multiply
    472,079.70x = 708,119.55 × 425,423.70
  4. Step 4: Simplify right side
    472,079.70x = 301,250,839,003.34
  5. Step 5: Solve for x
    x = 301,250,839,003.34/472,079.70
  6. Step 6: Final answer
    x = 638,135.55

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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.