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Finding the Fourth Proportional to 1,295.48, 1,787.70 and 705.98

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Solution

The fourth proportional to 1,295.48, 1,787.70 and 705.98 is: 974.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.48 : 1,787.70 = 705.98 : x
  2. Step 2: Convert to fraction form
    1,295.48/1,787.70 = 705.98/x
  3. Step 3: Cross multiply
    1,295.48x = 1,787.70 × 705.98
  4. Step 4: Simplify right side
    1,295.48x = 1,262,080.45
  5. Step 5: Solve for x
    x = 1,262,080.45/1,295.48
  6. Step 6: Final answer
    x = 974.22

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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.