Home / 1,279.48-1,919.76-630.22

Finding the Fourth Proportional to 1,279.48, 1,919.76 and 630.22

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Solution

The fourth proportional to 1,279.48, 1,919.76 and 630.22 is: 945.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.48 : 1,919.76 = 630.22 : x
  2. Step 2: Convert to fraction form
    1,279.48/1,919.76 = 630.22/x
  3. Step 3: Cross multiply
    1,279.48x = 1,919.76 × 630.22
  4. Step 4: Simplify right side
    1,279.48x = 1,209,871.15
  5. Step 5: Solve for x
    x = 1,209,871.15/1,279.48
  6. Step 6: Final answer
    x = 945.60

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1.5x scale

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.