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Finding the Fourth Proportional to 977.32, 1,464.54 and 874.60

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Solution

The fourth proportional to 977.32, 1,464.54 and 874.60 is: 1,310.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.32 : 1,464.54 = 874.60 : x
  2. Step 2: Convert to fraction form
    977.32/1,464.54 = 874.60/x
  3. Step 3: Cross multiply
    977.32x = 1,464.54 × 874.60
  4. Step 4: Simplify right side
    977.32x = 1,280,886.68
  5. Step 5: Solve for x
    x = 1,280,886.68/977.32
  6. Step 6: Final answer
    x = 1,310.61

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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.