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Finding the Fourth Proportional to 770.95, 1,153.68 and 617.86

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Solution

The fourth proportional to 770.95, 1,153.68 and 617.86 is: 924.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.95 : 1,153.68 = 617.86 : x
  2. Step 2: Convert to fraction form
    770.95/1,153.68 = 617.86/x
  3. Step 3: Cross multiply
    770.95x = 1,153.68 × 617.86
  4. Step 4: Simplify right side
    770.95x = 712,812.72
  5. Step 5: Solve for x
    x = 712,812.72/770.95
  6. Step 6: Final answer
    x = 924.59

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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.