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Finding the Fourth Proportional to 228,613.55, 315,491.76 and 130,494.78

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Solution

The fourth proportional to 228,613.55, 315,491.76 and 130,494.78 is: 180,085.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,613.55 : 315,491.76 = 130,494.78 : x
  2. Step 2: Convert to fraction form
    228,613.55/315,491.76 = 130,494.78/x
  3. Step 3: Cross multiply
    228,613.55x = 315,491.76 × 130,494.78
  4. Step 4: Simplify right side
    228,613.55x = 41,170,027,813.01
  5. Step 5: Solve for x
    x = 41,170,027,813.01/228,613.55
  6. Step 6: Final answer
    x = 180,085.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.