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Finding the Fourth Proportional to 910.18, 1,363.85 and 519.69

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Solution

The fourth proportional to 910.18, 1,363.85 and 519.69 is: 778.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.18 : 1,363.85 = 519.69 : x
  2. Step 2: Convert to fraction form
    910.18/1,363.85 = 519.69/x
  3. Step 3: Cross multiply
    910.18x = 1,363.85 × 519.69
  4. Step 4: Simplify right side
    910.18x = 708,779.21
  5. Step 5: Solve for x
    x = 708,779.21/910.18
  6. Step 6: Final answer
    x = 778.72

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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.