Home / 1,279.29-1,918.39-586.40

Finding the Fourth Proportional to 1,279.29, 1,918.39 and 586.40

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Solution

The fourth proportional to 1,279.29, 1,918.39 and 586.40 is: 879.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.29 : 1,918.39 = 586.40 : x
  2. Step 2: Convert to fraction form
    1,279.29/1,918.39 = 586.40/x
  3. Step 3: Cross multiply
    1,279.29x = 1,918.39 × 586.40
  4. Step 4: Simplify right side
    1,279.29x = 1,124,943.90
  5. Step 5: Solve for x
    x = 1,124,943.90/1,279.29
  6. Step 6: Final answer
    x = 879.35

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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.