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Finding the Fourth Proportional to 328,542.90, 492,717.15 and 128,748.30

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Solution

The fourth proportional to 328,542.90, 492,717.15 and 128,748.30 is: 193,084.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,542.90 : 492,717.15 = 128,748.30 : x
  2. Step 2: Convert to fraction form
    328,542.90/492,717.15 = 128,748.30/x
  3. Step 3: Cross multiply
    328,542.90x = 492,717.15 × 128,748.30
  4. Step 4: Simplify right side
    328,542.90x = 63,436,495,443.35
  5. Step 5: Solve for x
    x = 63,436,495,443.35/328,542.90
  6. Step 6: Final answer
    x = 193,084.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.