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Finding the Fourth Proportional to 479,328, 661,472.64 and 267,360

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Solution

The fourth proportional to 479,328, 661,472.64 and 267,360 is: 368,956.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,328 : 661,472.64 = 267,360 : x
  2. Step 2: Convert to fraction form
    479,328/661,472.64 = 267,360/x
  3. Step 3: Cross multiply
    479,328x = 661,472.64 × 267,360
  4. Step 4: Simplify right side
    479,328x = 176,851,325,030.40
  5. Step 5: Solve for x
    x = 176,851,325,030.40/479,328
  6. Step 6: Final answer
    x = 368,956.80

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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.