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Finding the Fourth Proportional to 479,371.68, 661,798.08 and 288,432

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Solution

The fourth proportional to 479,371.68, 661,798.08 and 288,432 is: 398,195.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,371.68 : 661,798.08 = 288,432 : x
  2. Step 2: Convert to fraction form
    479,371.68/661,798.08 = 288,432/x
  3. Step 3: Cross multiply
    479,371.68x = 661,798.08 × 288,432
  4. Step 4: Simplify right side
    479,371.68x = 190,883,743,810.56
  5. Step 5: Solve for x
    x = 190,883,743,810.56/479,371.68
  6. Step 6: Final answer
    x = 398,195.70

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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.