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Finding the Fourth Proportional to 1,787.65, 2,681.61 and 555.15

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Solution

The fourth proportional to 1,787.65, 2,681.61 and 555.15 is: 832.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.65 : 2,681.61 = 555.15 : x
  2. Step 2: Convert to fraction form
    1,787.65/2,681.61 = 555.15/x
  3. Step 3: Cross multiply
    1,787.65x = 2,681.61 × 555.15
  4. Step 4: Simplify right side
    1,787.65x = 1,488,695.79
  5. Step 5: Solve for x
    x = 1,488,695.79/1,787.65
  6. Step 6: Final answer
    x = 832.77

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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.