Home / 1,319.32-1,979.28-702.70

Finding the Fourth Proportional to 1,319.32, 1,979.28 and 702.70

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Solution

The fourth proportional to 1,319.32, 1,979.28 and 702.70 is: 1,054.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.32 : 1,979.28 = 702.70 : x
  2. Step 2: Convert to fraction form
    1,319.32/1,979.28 = 702.70/x
  3. Step 3: Cross multiply
    1,319.32x = 1,979.28 × 702.70
  4. Step 4: Simplify right side
    1,319.32x = 1,390,840.06
  5. Step 5: Solve for x
    x = 1,390,840.06/1,319.32
  6. Step 6: Final answer
    x = 1,054.21

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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.