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Finding the Fourth Proportional to 354,660.80, 489,504.74 and 216,863.28

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Solution

The fourth proportional to 354,660.80, 489,504.74 and 216,863.28 is: 299,315.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,660.80 : 489,504.74 = 216,863.28 : x
  2. Step 2: Convert to fraction form
    354,660.80/489,504.74 = 216,863.28/x
  3. Step 3: Cross multiply
    354,660.80x = 489,504.74 × 216,863.28
  4. Step 4: Simplify right side
    354,660.80x = 106,155,602,407.63
  5. Step 5: Solve for x
    x = 106,155,602,407.63/354,660.80
  6. Step 6: Final answer
    x = 299,315.86

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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.