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Finding the Fourth Proportional to 354,889.09, 489,717.52 and 201,886.57

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Solution

The fourth proportional to 354,889.09, 489,717.52 and 201,886.57 is: 278,586.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,889.09 : 489,717.52 = 201,886.57 : x
  2. Step 2: Convert to fraction form
    354,889.09/489,717.52 = 201,886.57/x
  3. Step 3: Cross multiply
    354,889.09x = 489,717.52 × 201,886.57
  4. Step 4: Simplify right side
    354,889.09x = 98,867,390,381.71
  5. Step 5: Solve for x
    x = 98,867,390,381.71/354,889.09
  6. Step 6: Final answer
    x = 278,586.73

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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.