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Finding the Fourth Proportional to 368,417.52, 552,880.04 and 128,532.78

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Solution

The fourth proportional to 368,417.52, 552,880.04 and 128,532.78 is: 192,887.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,417.52 : 552,880.04 = 128,532.78 : x
  2. Step 2: Convert to fraction form
    368,417.52/552,880.04 = 128,532.78/x
  3. Step 3: Cross multiply
    368,417.52x = 552,880.04 × 128,532.78
  4. Step 4: Simplify right side
    368,417.52x = 71,063,207,905.05
  5. Step 5: Solve for x
    x = 71,063,207,905.05/368,417.52
  6. Step 6: Final answer
    x = 192,887.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.