Home / 1,295.18-1,787.32-705.72

Finding the Fourth Proportional to 1,295.18, 1,787.32 and 705.72

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Solution

The fourth proportional to 1,295.18, 1,787.32 and 705.72 is: 973.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.18 : 1,787.32 = 705.72 : x
  2. Step 2: Convert to fraction form
    1,295.18/1,787.32 = 705.72/x
  3. Step 3: Cross multiply
    1,295.18x = 1,787.32 × 705.72
  4. Step 4: Simplify right side
    1,295.18x = 1,261,347.47
  5. Step 5: Solve for x
    x = 1,261,347.47/1,295.18
  6. Step 6: Final answer
    x = 973.88

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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.