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Finding the Fourth Proportional to 478,288.64, 660,008.01 and 263,428.70

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Solution

The fourth proportional to 478,288.64, 660,008.01 and 263,428.70 is: 363,514.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,288.64 : 660,008.01 = 263,428.70 : x
  2. Step 2: Convert to fraction form
    478,288.64/660,008.01 = 263,428.70/x
  3. Step 3: Cross multiply
    478,288.64x = 660,008.01 × 263,428.70
  4. Step 4: Simplify right side
    478,288.64x = 173,865,048,763.85
  5. Step 5: Solve for x
    x = 173,865,048,763.85/478,288.64
  6. Step 6: Final answer
    x = 363,514.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.