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Finding the Fourth Proportional to 1,103.65, 1,654.45 and 555.19

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Solution

The fourth proportional to 1,103.65, 1,654.45 and 555.19 is: 832.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,103.65 : 1,654.45 = 555.19 : x
  2. Step 2: Convert to fraction form
    1,103.65/1,654.45 = 555.19/x
  3. Step 3: Cross multiply
    1,103.65x = 1,654.45 × 555.19
  4. Step 4: Simplify right side
    1,103.65x = 918,534.10
  5. Step 5: Solve for x
    x = 918,534.10/1,103.65
  6. Step 6: Final answer
    x = 832.27

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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.