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Finding the Fourth Proportional to 1,248.86, 1,872.54 and 555.18

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Solution

The fourth proportional to 1,248.86, 1,872.54 and 555.18 is: 832.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.86 : 1,872.54 = 555.18 : x
  2. Step 2: Convert to fraction form
    1,248.86/1,872.54 = 555.18/x
  3. Step 3: Cross multiply
    1,248.86x = 1,872.54 × 555.18
  4. Step 4: Simplify right side
    1,248.86x = 1,039,596.76
  5. Step 5: Solve for x
    x = 1,039,596.76/1,248.86
  6. Step 6: Final answer
    x = 832.44

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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.