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Finding the Fourth Proportional to 875.01, 1,311.44 and 354.72

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Solution

The fourth proportional to 875.01, 1,311.44 and 354.72 is: 531.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.01 : 1,311.44 = 354.72 : x
  2. Step 2: Convert to fraction form
    875.01/1,311.44 = 354.72/x
  3. Step 3: Cross multiply
    875.01x = 1,311.44 × 354.72
  4. Step 4: Simplify right side
    875.01x = 465,192.22
  5. Step 5: Solve for x
    x = 465,192.22/875.01
  6. Step 6: Final answer
    x = 531.64

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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.