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Finding the Fourth Proportional to 1,193.65, 1,787.42 and 707.05

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Solution

The fourth proportional to 1,193.65, 1,787.42 and 707.05 is: 1,058.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,193.65 : 1,787.42 = 707.05 : x
  2. Step 2: Convert to fraction form
    1,193.65/1,787.42 = 707.05/x
  3. Step 3: Cross multiply
    1,193.65x = 1,787.42 × 707.05
  4. Step 4: Simplify right side
    1,193.65x = 1,263,795.31
  5. Step 5: Solve for x
    x = 1,263,795.31/1,193.65
  6. Step 6: Final answer
    x = 1,058.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.