Home / 1,296.60-1,944.90-430.80

Finding the Fourth Proportional to 1,296.60, 1,944.90 and 430.80

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Solution

The fourth proportional to 1,296.60, 1,944.90 and 430.80 is: 646.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296.60 : 1,944.90 = 430.80 : x
  2. Step 2: Convert to fraction form
    1,296.60/1,944.90 = 430.80/x
  3. Step 3: Cross multiply
    1,296.60x = 1,944.90 × 430.80
  4. Step 4: Simplify right side
    1,296.60x = 837,862.92
  5. Step 5: Solve for x
    x = 837,862.92/1,296.60
  6. Step 6: Final answer
    x = 646.20

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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.