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Finding the Fourth Proportional to 617.83, 925.65 and 515.77

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Solution

The fourth proportional to 617.83, 925.65 and 515.77 is: 772.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.83 : 925.65 = 515.77 : x
  2. Step 2: Convert to fraction form
    617.83/925.65 = 515.77/x
  3. Step 3: Cross multiply
    617.83x = 925.65 × 515.77
  4. Step 4: Simplify right side
    617.83x = 477,420.19
  5. Step 5: Solve for x
    x = 477,420.19/617.83
  6. Step 6: Final answer
    x = 772.74

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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.