Home / 1,590.30-2,387.07-1,128.60

Finding the Fourth Proportional to 1,590.30, 2,387.07 and 1,128.60

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Solution

The fourth proportional to 1,590.30, 2,387.07 and 1,128.60 is: 1,694.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,590.30 : 2,387.07 = 1,128.60 : x
  2. Step 2: Convert to fraction form
    1,590.30/2,387.07 = 1,128.60/x
  3. Step 3: Cross multiply
    1,590.30x = 2,387.07 × 1,128.60
  4. Step 4: Simplify right side
    1,590.30x = 2,694,047.20
  5. Step 5: Solve for x
    x = 2,694,047.20/1,590.30
  6. Step 6: Final answer
    x = 1,694.05

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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.