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Finding the Fourth Proportional to 770.04, 1,154.40 and 308.15

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Solution

The fourth proportional to 770.04, 1,154.40 and 308.15 is: 461.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.04 : 1,154.40 = 308.15 : x
  2. Step 2: Convert to fraction form
    770.04/1,154.40 = 308.15/x
  3. Step 3: Cross multiply
    770.04x = 1,154.40 × 308.15
  4. Step 4: Simplify right side
    770.04x = 355,722.59
  5. Step 5: Solve for x
    x = 355,722.59/770.04
  6. Step 6: Final answer
    x = 461.95

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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.