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Finding the Fourth Proportional to 628,613.28, 867,486.28 and 342,135.42

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Solution

The fourth proportional to 628,613.28, 867,486.28 and 342,135.42 is: 472,146.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,613.28 : 867,486.28 = 342,135.42 : x
  2. Step 2: Convert to fraction form
    628,613.28/867,486.28 = 342,135.42/x
  3. Step 3: Cross multiply
    628,613.28x = 867,486.28 × 342,135.42
  4. Step 4: Simplify right side
    628,613.28x = 296,797,782,752.04
  5. Step 5: Solve for x
    x = 296,797,782,752.04/628,613.28
  6. Step 6: Final answer
    x = 472,146.85

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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.