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Finding the Fourth Proportional to 901.61, 1,354.77 and 786.34

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Solution

The fourth proportional to 901.61, 1,354.77 and 786.34 is: 1,181.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.61 : 1,354.77 = 786.34 : x
  2. Step 2: Convert to fraction form
    901.61/1,354.77 = 786.34/x
  3. Step 3: Cross multiply
    901.61x = 1,354.77 × 786.34
  4. Step 4: Simplify right side
    901.61x = 1,065,306.45
  5. Step 5: Solve for x
    x = 1,065,306.45/901.61
  6. Step 6: Final answer
    x = 1,181.57

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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.