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Finding the Fourth Proportional to 1,651.64, 2,478.60 and 677.74

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Solution

The fourth proportional to 1,651.64, 2,478.60 and 677.74 is: 1,017.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,651.64 : 2,478.60 = 677.74 : x
  2. Step 2: Convert to fraction form
    1,651.64/2,478.60 = 677.74/x
  3. Step 3: Cross multiply
    1,651.64x = 2,478.60 × 677.74
  4. Step 4: Simplify right side
    1,651.64x = 1,679,851.79
  5. Step 5: Solve for x
    x = 1,679,851.79/1,651.64
  6. Step 6: Final answer
    x = 1,017.08

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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.