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Finding the Fourth Proportional to 354,931.34, 489,801.53 and 193,785.89

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Solution

The fourth proportional to 354,931.34, 489,801.53 and 193,785.89 is: 267,422.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,931.34 : 489,801.53 = 193,785.89 : x
  2. Step 2: Convert to fraction form
    354,931.34/489,801.53 = 193,785.89/x
  3. Step 3: Cross multiply
    354,931.34x = 489,801.53 × 193,785.89
  4. Step 4: Simplify right side
    354,931.34x = 94,916,623,449.87
  5. Step 5: Solve for x
    x = 94,916,623,449.87/354,931.34
  6. Step 6: Final answer
    x = 267,422.50

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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.