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Finding the Fourth Proportional to 1,339.10, 2,007.90 and 608.24

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Solution

The fourth proportional to 1,339.10, 2,007.90 and 608.24 is: 912.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339.10 : 2,007.90 = 608.24 : x
  2. Step 2: Convert to fraction form
    1,339.10/2,007.90 = 608.24/x
  3. Step 3: Cross multiply
    1,339.10x = 2,007.90 × 608.24
  4. Step 4: Simplify right side
    1,339.10x = 1,221,285.10
  5. Step 5: Solve for x
    x = 1,221,285.10/1,339.10
  6. Step 6: Final answer
    x = 912.02

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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.