Home / 1,296.55-1,944.40-430.66

Finding the Fourth Proportional to 1,296.55, 1,944.40 and 430.66

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Solution

The fourth proportional to 1,296.55, 1,944.40 and 430.66 is: 645.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296.55 : 1,944.40 = 430.66 : x
  2. Step 2: Convert to fraction form
    1,296.55/1,944.40 = 430.66/x
  3. Step 3: Cross multiply
    1,296.55x = 1,944.40 × 430.66
  4. Step 4: Simplify right side
    1,296.55x = 837,375.30
  5. Step 5: Solve for x
    x = 837,375.30/1,296.55
  6. Step 6: Final answer
    x = 645.85

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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.