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Finding the Fourth Proportional to 917.33, 1,374.84 and 397.58

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Solution

The fourth proportional to 917.33, 1,374.84 and 397.58 is: 595.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.33 : 1,374.84 = 397.58 : x
  2. Step 2: Convert to fraction form
    917.33/1,374.84 = 397.58/x
  3. Step 3: Cross multiply
    917.33x = 1,374.84 × 397.58
  4. Step 4: Simplify right side
    917.33x = 546,602.01
  5. Step 5: Solve for x
    x = 546,602.01/917.33
  6. Step 6: Final answer
    x = 595.87

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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.