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Finding the Fourth Proportional to 318,923.20, 478,384.80 and 231,005.80

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Solution

The fourth proportional to 318,923.20, 478,384.80 and 231,005.80 is: 346,508.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,923.20 : 478,384.80 = 231,005.80 : x
  2. Step 2: Convert to fraction form
    318,923.20/478,384.80 = 231,005.80/x
  3. Step 3: Cross multiply
    318,923.20x = 478,384.80 × 231,005.80
  4. Step 4: Simplify right side
    318,923.20x = 110,509,663,431.84
  5. Step 5: Solve for x
    x = 110,509,663,431.84/318,923.20
  6. Step 6: Final answer
    x = 346,508.70

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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.