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Finding the Fourth Proportional to 368,990.80, 553,615.80 and 132,341.20

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Solution

The fourth proportional to 368,990.80, 553,615.80 and 132,341.20 is: 198,558.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,990.80 : 553,615.80 = 132,341.20 : x
  2. Step 2: Convert to fraction form
    368,990.80/553,615.80 = 132,341.20/x
  3. Step 3: Cross multiply
    368,990.80x = 553,615.80 × 132,341.20
  4. Step 4: Simplify right side
    368,990.80x = 73,266,179,310.96
  5. Step 5: Solve for x
    x = 73,266,179,310.96/368,990.80
  6. Step 6: Final answer
    x = 198,558.28

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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.