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Finding the Fourth Proportional to 770.10, 1,152.45 and 537.90

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Solution

The fourth proportional to 770.10, 1,152.45 and 537.90 is: 804.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.10 : 1,152.45 = 537.90 : x
  2. Step 2: Convert to fraction form
    770.10/1,152.45 = 537.90/x
  3. Step 3: Cross multiply
    770.10x = 1,152.45 × 537.90
  4. Step 4: Simplify right side
    770.10x = 619,902.86
  5. Step 5: Solve for x
    x = 619,902.86/770.10
  6. Step 6: Final answer
    x = 804.96

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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.