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Finding the Fourth Proportional to 977.59, 1,466.75 and 361.70

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Solution

The fourth proportional to 977.59, 1,466.75 and 361.70 is: 542.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.59 : 1,466.75 = 361.70 : x
  2. Step 2: Convert to fraction form
    977.59/1,466.75 = 361.70/x
  3. Step 3: Cross multiply
    977.59x = 1,466.75 × 361.70
  4. Step 4: Simplify right side
    977.59x = 530,523.48
  5. Step 5: Solve for x
    x = 530,523.48/977.59
  6. Step 6: Final answer
    x = 542.69

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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.