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Finding the Fourth Proportional to 354,689.18, 489,472.31 and 193,547.78

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Solution

The fourth proportional to 354,689.18, 489,472.31 and 193,547.78 is: 267,096.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,689.18 : 489,472.31 = 193,547.78 : x
  2. Step 2: Convert to fraction form
    354,689.18/489,472.31 = 193,547.78/x
  3. Step 3: Cross multiply
    354,689.18x = 489,472.31 × 193,547.78
  4. Step 4: Simplify right side
    354,689.18x = 94,736,278,971.97
  5. Step 5: Solve for x
    x = 94,736,278,971.97/354,689.18
  6. Step 6: Final answer
    x = 267,096.61

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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.