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Finding the Fourth Proportional to 2,876.58, 4,315.05 and 928.86

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Solution

The fourth proportional to 2,876.58, 4,315.05 and 928.86 is: 1,393.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,876.58 : 4,315.05 = 928.86 : x
  2. Step 2: Convert to fraction form
    2,876.58/4,315.05 = 928.86/x
  3. Step 3: Cross multiply
    2,876.58x = 4,315.05 × 928.86
  4. Step 4: Simplify right side
    2,876.58x = 4,008,077.34
  5. Step 5: Solve for x
    x = 4,008,077.34/2,876.58
  6. Step 6: Final answer
    x = 1,393.35

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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.