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Finding the Fourth Proportional to 353,147.48, 487,353.74 and 215,334.52

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Solution

The fourth proportional to 353,147.48, 487,353.74 and 215,334.52 is: 297,167.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,147.48 : 487,353.74 = 215,334.52 : x
  2. Step 2: Convert to fraction form
    353,147.48/487,353.74 = 215,334.52/x
  3. Step 3: Cross multiply
    353,147.48x = 487,353.74 × 215,334.52
  4. Step 4: Simplify right side
    353,147.48x = 104,944,083,673.11
  5. Step 5: Solve for x
    x = 104,944,083,673.11/353,147.48
  6. Step 6: Final answer
    x = 297,167.87

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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.