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Finding the Fourth Proportional to 860.39, 1,291.11 and 373.44

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Solution

The fourth proportional to 860.39, 1,291.11 and 373.44 is: 560.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.39 : 1,291.11 = 373.44 : x
  2. Step 2: Convert to fraction form
    860.39/1,291.11 = 373.44/x
  3. Step 3: Cross multiply
    860.39x = 1,291.11 × 373.44
  4. Step 4: Simplify right side
    860.39x = 482,152.12
  5. Step 5: Solve for x
    x = 482,152.12/860.39
  6. Step 6: Final answer
    x = 560.39

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1.5x scale

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.