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Finding the Fourth Proportional to 1,465.82, 2,197.20 and 916.74

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Solution

The fourth proportional to 1,465.82, 2,197.20 and 916.74 is: 1,374.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,465.82 : 2,197.20 = 916.74 : x
  2. Step 2: Convert to fraction form
    1,465.82/2,197.20 = 916.74/x
  3. Step 3: Cross multiply
    1,465.82x = 2,197.20 × 916.74
  4. Step 4: Simplify right side
    1,465.82x = 2,014,261.13
  5. Step 5: Solve for x
    x = 2,014,261.13/1,465.82
  6. Step 6: Final answer
    x = 1,374.15

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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.