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Finding the Fourth Proportional to 770.86, 1,156.56 and 337.96

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Solution

The fourth proportional to 770.86, 1,156.56 and 337.96 is: 507.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.86 : 1,156.56 = 337.96 : x
  2. Step 2: Convert to fraction form
    770.86/1,156.56 = 337.96/x
  3. Step 3: Cross multiply
    770.86x = 1,156.56 × 337.96
  4. Step 4: Simplify right side
    770.86x = 390,871.02
  5. Step 5: Solve for x
    x = 390,871.02/770.86
  6. Step 6: Final answer
    x = 507.06

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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.