Home / 1,407.56-2,111.38-638.04

Finding the Fourth Proportional to 1,407.56, 2,111.38 and 638.04

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Solution

The fourth proportional to 1,407.56, 2,111.38 and 638.04 is: 957.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,407.56 : 2,111.38 = 638.04 : x
  2. Step 2: Convert to fraction form
    1,407.56/2,111.38 = 638.04/x
  3. Step 3: Cross multiply
    1,407.56x = 2,111.38 × 638.04
  4. Step 4: Simplify right side
    1,407.56x = 1,347,144.90
  5. Step 5: Solve for x
    x = 1,347,144.90/1,407.56
  6. Step 6: Final answer
    x = 957.08

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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.