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Finding the Fourth Proportional to 478,279.74, 660,056 and 263,419.75

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Solution

The fourth proportional to 478,279.74, 660,056 and 263,419.75 is: 363,535.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,279.74 : 660,056 = 263,419.75 : x
  2. Step 2: Convert to fraction form
    478,279.74/660,056 = 263,419.75/x
  3. Step 3: Cross multiply
    478,279.74x = 660,056 × 263,419.75
  4. Step 4: Simplify right side
    478,279.74x = 173,871,786,506
  5. Step 5: Solve for x
    x = 173,871,786,506/478,279.74
  6. Step 6: Final answer
    x = 363,535.76

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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.