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Finding the Fourth Proportional to 478,899.79, 660,886.87 and 261,106.69

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Solution

The fourth proportional to 478,899.79, 660,886.87 and 261,106.69 is: 360,330.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,899.79 : 660,886.87 = 261,106.69 : x
  2. Step 2: Convert to fraction form
    478,899.79/660,886.87 = 261,106.69/x
  3. Step 3: Cross multiply
    478,899.79x = 660,886.87 × 261,106.69
  4. Step 4: Simplify right side
    478,899.79x = 172,561,981,217.36
  5. Step 5: Solve for x
    x = 172,561,981,217.36/478,899.79
  6. Step 6: Final answer
    x = 360,330.04

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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.