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Finding the Fourth Proportional to 1,295.51, 1,787.13 and 875.30

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Solution

The fourth proportional to 1,295.51, 1,787.13 and 875.30 is: 1,207.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.51 : 1,787.13 = 875.30 : x
  2. Step 2: Convert to fraction form
    1,295.51/1,787.13 = 875.30/x
  3. Step 3: Cross multiply
    1,295.51x = 1,787.13 × 875.30
  4. Step 4: Simplify right side
    1,295.51x = 1,564,265.95
  5. Step 5: Solve for x
    x = 1,564,265.95/1,295.51
  6. Step 6: Final answer
    x = 1,207.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.