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Finding the Fourth Proportional to 874.08, 1,312.01 and 775.89

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Solution

The fourth proportional to 874.08, 1,312.01 and 775.89 is: 1,164.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.08 : 1,312.01 = 775.89 : x
  2. Step 2: Convert to fraction form
    874.08/1,312.01 = 775.89/x
  3. Step 3: Cross multiply
    874.08x = 1,312.01 × 775.89
  4. Step 4: Simplify right side
    874.08x = 1,017,971.56
  5. Step 5: Solve for x
    x = 1,017,971.56/874.08
  6. Step 6: Final answer
    x = 1,164.62

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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.