Home / 1,039.08-1,430.87-928.52

Finding the Fourth Proportional to 1,039.08, 1,430.87 and 928.52

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Solution

The fourth proportional to 1,039.08, 1,430.87 and 928.52 is: 1,278.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,039.08 : 1,430.87 = 928.52 : x
  2. Step 2: Convert to fraction form
    1,039.08/1,430.87 = 928.52/x
  3. Step 3: Cross multiply
    1,039.08x = 1,430.87 × 928.52
  4. Step 4: Simplify right side
    1,039.08x = 1,328,579.62
  5. Step 5: Solve for x
    x = 1,328,579.62/1,039.08
  6. Step 6: Final answer
    x = 1,278.61

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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.