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Finding the Fourth Proportional to 977.62, 1,465.35 and 422.77

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Solution

The fourth proportional to 977.62, 1,465.35 and 422.77 is: 633.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.62 : 1,465.35 = 422.77 : x
  2. Step 2: Convert to fraction form
    977.62/1,465.35 = 422.77/x
  3. Step 3: Cross multiply
    977.62x = 1,465.35 × 422.77
  4. Step 4: Simplify right side
    977.62x = 619,506.02
  5. Step 5: Solve for x
    x = 619,506.02/977.62
  6. Step 6: Final answer
    x = 633.69

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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.