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Finding the Fourth Proportional to 368,988.80, 553,612.80 and 132,339.20

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Solution

The fourth proportional to 368,988.80, 553,612.80 and 132,339.20 is: 198,555.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,988.80 : 553,612.80 = 132,339.20 : x
  2. Step 2: Convert to fraction form
    368,988.80/553,612.80 = 132,339.20/x
  3. Step 3: Cross multiply
    368,988.80x = 553,612.80 × 132,339.20
  4. Step 4: Simplify right side
    368,988.80x = 73,264,675,061.76
  5. Step 5: Solve for x
    x = 73,264,675,061.76/368,988.80
  6. Step 6: Final answer
    x = 198,555.28

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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.