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Finding the Fourth Proportional to 1,116.87, 1,674.50 and 705.93

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Solution

The fourth proportional to 1,116.87, 1,674.50 and 705.93 is: 1,058.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.87 : 1,674.50 = 705.93 : x
  2. Step 2: Convert to fraction form
    1,116.87/1,674.50 = 705.93/x
  3. Step 3: Cross multiply
    1,116.87x = 1,674.50 × 705.93
  4. Step 4: Simplify right side
    1,116.87x = 1,182,076.26
  5. Step 5: Solve for x
    x = 1,182,076.26/1,116.87
  6. Step 6: Final answer
    x = 1,058.38

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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.