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Finding the Fourth Proportional to 770.10, 1,155.24 and 283.04

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Solution

The fourth proportional to 770.10, 1,155.24 and 283.04 is: 424.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.10 : 1,155.24 = 283.04 : x
  2. Step 2: Convert to fraction form
    770.10/1,155.24 = 283.04/x
  3. Step 3: Cross multiply
    770.10x = 1,155.24 × 283.04
  4. Step 4: Simplify right side
    770.10x = 326,979.13
  5. Step 5: Solve for x
    x = 326,979.13/770.10
  6. Step 6: Final answer
    x = 424.59

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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.