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Finding the Fourth Proportional to 354,519.34, 489,149.22 and 216,663.10

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Solution

The fourth proportional to 354,519.34, 489,149.22 and 216,663.10 is: 298,941.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,519.34 : 489,149.22 = 216,663.10 : x
  2. Step 2: Convert to fraction form
    354,519.34/489,149.22 = 216,663.10/x
  3. Step 3: Cross multiply
    354,519.34x = 489,149.22 × 216,663.10
  4. Step 4: Simplify right side
    354,519.34x = 105,980,586,367.78
  5. Step 5: Solve for x
    x = 105,980,586,367.78/354,519.34
  6. Step 6: Final answer
    x = 298,941.62

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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.