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Finding the Fourth Proportional to 1,403.40, 2,103.26 and 580.52

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Solution

The fourth proportional to 1,403.40, 2,103.26 and 580.52 is: 870.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.40 : 2,103.26 = 580.52 : x
  2. Step 2: Convert to fraction form
    1,403.40/2,103.26 = 580.52/x
  3. Step 3: Cross multiply
    1,403.40x = 2,103.26 × 580.52
  4. Step 4: Simplify right side
    1,403.40x = 1,220,984.50
  5. Step 5: Solve for x
    x = 1,220,984.50/1,403.40
  6. Step 6: Final answer
    x = 870.02

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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.