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Finding the Fourth Proportional to 3,312.52, 4,570.77 and 1,915

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Solution

The fourth proportional to 3,312.52, 4,570.77 and 1,915 is: 2,642.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,312.52 : 4,570.77 = 1,915 : x
  2. Step 2: Convert to fraction form
    3,312.52/4,570.77 = 1,915/x
  3. Step 3: Cross multiply
    3,312.52x = 4,570.77 × 1,915
  4. Step 4: Simplify right side
    3,312.52x = 8,753,024.55
  5. Step 5: Solve for x
    x = 8,753,024.55/3,312.52
  6. Step 6: Final answer
    x = 2,642.41

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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.