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Finding the Fourth Proportional to 2,709.60, 4,062.84 and 977.52

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Solution

The fourth proportional to 2,709.60, 4,062.84 and 977.52 is: 1,465.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,709.60 : 4,062.84 = 977.52 : x
  2. Step 2: Convert to fraction form
    2,709.60/4,062.84 = 977.52/x
  3. Step 3: Cross multiply
    2,709.60x = 4,062.84 × 977.52
  4. Step 4: Simplify right side
    2,709.60x = 3,971,507.36
  5. Step 5: Solve for x
    x = 3,971,507.36/2,709.60
  6. Step 6: Final answer
    x = 1,465.72

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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.