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Finding the Fourth Proportional to 1,295.23, 1,787.42 and 705.76

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Solution

The fourth proportional to 1,295.23, 1,787.42 and 705.76 is: 973.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.23 : 1,787.42 = 705.76 : x
  2. Step 2: Convert to fraction form
    1,295.23/1,787.42 = 705.76/x
  3. Step 3: Cross multiply
    1,295.23x = 1,787.42 × 705.76
  4. Step 4: Simplify right side
    1,295.23x = 1,261,492.92
  5. Step 5: Solve for x
    x = 1,261,492.92/1,295.23
  6. Step 6: Final answer
    x = 973.95

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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.