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Finding the Fourth Proportional to 1,145.14, 1,580.31 and 702.77

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Solution

The fourth proportional to 1,145.14, 1,580.31 and 702.77 is: 969.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.14 : 1,580.31 = 702.77 : x
  2. Step 2: Convert to fraction form
    1,145.14/1,580.31 = 702.77/x
  3. Step 3: Cross multiply
    1,145.14x = 1,580.31 × 702.77
  4. Step 4: Simplify right side
    1,145.14x = 1,110,586.56
  5. Step 5: Solve for x
    x = 1,110,586.56/1,145.14
  6. Step 6: Final answer
    x = 969.83

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1.5x scale

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.