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Finding the Fourth Proportional to 909.08, 1,256.85 and 699.95

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Solution

The fourth proportional to 909.08, 1,256.85 and 699.95 is: 967.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.08 : 1,256.85 = 699.95 : x
  2. Step 2: Convert to fraction form
    909.08/1,256.85 = 699.95/x
  3. Step 3: Cross multiply
    909.08x = 1,256.85 × 699.95
  4. Step 4: Simplify right side
    909.08x = 879,728.50
  5. Step 5: Solve for x
    x = 879,728.50/909.08
  6. Step 6: Final answer
    x = 967.71

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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.