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Finding the Fourth Proportional to 851.90, 1,173.86 and 586.42

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Solution

The fourth proportional to 851.90, 1,173.86 and 586.42 is: 808.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.90 : 1,173.86 = 586.42 : x
  2. Step 2: Convert to fraction form
    851.90/1,173.86 = 586.42/x
  3. Step 3: Cross multiply
    851.90x = 1,173.86 × 586.42
  4. Step 4: Simplify right side
    851.90x = 688,374.98
  5. Step 5: Solve for x
    x = 688,374.98/851.90
  6. Step 6: Final answer
    x = 808.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.