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Finding the Fourth Proportional to 438,613.38, 605,291.46 and 257,328.44

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Solution

The fourth proportional to 438,613.38, 605,291.46 and 257,328.44 is: 355,116.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,613.38 : 605,291.46 = 257,328.44 : x
  2. Step 2: Convert to fraction form
    438,613.38/605,291.46 = 257,328.44/x
  3. Step 3: Cross multiply
    438,613.38x = 605,291.46 × 257,328.44
  4. Step 4: Simplify right side
    438,613.38x = 155,758,707,147.12
  5. Step 5: Solve for x
    x = 155,758,707,147.12/438,613.38
  6. Step 6: Final answer
    x = 355,116.18

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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.