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Finding the Fourth Proportional to 354,852.55, 489,690.20 and 201,887.45

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Solution

The fourth proportional to 354,852.55, 489,690.20 and 201,887.45 is: 278,601.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,852.55 : 489,690.20 = 201,887.45 : x
  2. Step 2: Convert to fraction form
    354,852.55/489,690.20 = 201,887.45/x
  3. Step 3: Cross multiply
    354,852.55x = 489,690.20 × 201,887.45
  4. Step 4: Simplify right side
    354,852.55x = 98,862,305,660.60
  5. Step 5: Solve for x
    x = 98,862,305,660.60/354,852.55
  6. Step 6: Final answer
    x = 278,601.08

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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.