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Finding the Fourth Proportional to 219,036.80, 328,555.20 and 144,387.20

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Solution

The fourth proportional to 219,036.80, 328,555.20 and 144,387.20 is: 216,580.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,036.80 : 328,555.20 = 144,387.20 : x
  2. Step 2: Convert to fraction form
    219,036.80/328,555.20 = 144,387.20/x
  3. Step 3: Cross multiply
    219,036.80x = 328,555.20 × 144,387.20
  4. Step 4: Simplify right side
    219,036.80x = 47,439,165,373.44
  5. Step 5: Solve for x
    x = 47,439,165,373.44/219,036.80
  6. Step 6: Final answer
    x = 216,580.80

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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.