Home / 1,145.07-1,579.66-702.70

Finding the Fourth Proportional to 1,145.07, 1,579.66 and 702.70

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Solution

The fourth proportional to 1,145.07, 1,579.66 and 702.70 is: 969.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.07 : 1,579.66 = 702.70 : x
  2. Step 2: Convert to fraction form
    1,145.07/1,579.66 = 702.70/x
  3. Step 3: Cross multiply
    1,145.07x = 1,579.66 × 702.70
  4. Step 4: Simplify right side
    1,145.07x = 1,110,021.38
  5. Step 5: Solve for x
    x = 1,110,021.38/1,145.07
  6. Step 6: Final answer
    x = 969.39

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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.