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Finding the Fourth Proportional to 2,920.58, 4,380.87 and 972.74

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Solution

The fourth proportional to 2,920.58, 4,380.87 and 972.74 is: 1,459.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920.58 : 4,380.87 = 972.74 : x
  2. Step 2: Convert to fraction form
    2,920.58/4,380.87 = 972.74/x
  3. Step 3: Cross multiply
    2,920.58x = 4,380.87 × 972.74
  4. Step 4: Simplify right side
    2,920.58x = 4,261,447.48
  5. Step 5: Solve for x
    x = 4,261,447.48/2,920.58
  6. Step 6: Final answer
    x = 1,459.11

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1.5x scale

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.