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Finding the Fourth Proportional to 1,340.02, 2,010.72 and 638.02

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Solution

The fourth proportional to 1,340.02, 2,010.72 and 638.02 is: 957.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.02 : 2,010.72 = 638.02 : x
  2. Step 2: Convert to fraction form
    1,340.02/2,010.72 = 638.02/x
  3. Step 3: Cross multiply
    1,340.02x = 2,010.72 × 638.02
  4. Step 4: Simplify right side
    1,340.02x = 1,282,884.66
  5. Step 5: Solve for x
    x = 1,282,884.66/1,340.02
  6. Step 6: Final answer
    x = 957.36

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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.