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Finding the Fourth Proportional to 893.20, 1,340.76 and 460.24

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Solution

The fourth proportional to 893.20, 1,340.76 and 460.24 is: 690.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.20 : 1,340.76 = 460.24 : x
  2. Step 2: Convert to fraction form
    893.20/1,340.76 = 460.24/x
  3. Step 3: Cross multiply
    893.20x = 1,340.76 × 460.24
  4. Step 4: Simplify right side
    893.20x = 617,071.38
  5. Step 5: Solve for x
    x = 617,071.38/893.20
  6. Step 6: Final answer
    x = 690.85

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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.