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Finding the Fourth Proportional to 1,295.16, 1,787.31 and 705.70

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Solution

The fourth proportional to 1,295.16, 1,787.31 and 705.70 is: 973.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.16 : 1,787.31 = 705.70 : x
  2. Step 2: Convert to fraction form
    1,295.16/1,787.31 = 705.70/x
  3. Step 3: Cross multiply
    1,295.16x = 1,787.31 × 705.70
  4. Step 4: Simplify right side
    1,295.16x = 1,261,295.73
  5. Step 5: Solve for x
    x = 1,261,295.73/1,295.16
  6. Step 6: Final answer
    x = 973.85

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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.