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Finding the Fourth Proportional to 916.30, 1,374.47 and 267.06

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Solution

The fourth proportional to 916.30, 1,374.47 and 267.06 is: 400.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.30 : 1,374.47 = 267.06 : x
  2. Step 2: Convert to fraction form
    916.30/1,374.47 = 267.06/x
  3. Step 3: Cross multiply
    916.30x = 1,374.47 × 267.06
  4. Step 4: Simplify right side
    916.30x = 367,065.96
  5. Step 5: Solve for x
    x = 367,065.96/916.30
  6. Step 6: Final answer
    x = 400.60

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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.