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Finding the Fourth Proportional to 328,892.40, 493,354.80 and 171,428.40

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Solution

The fourth proportional to 328,892.40, 493,354.80 and 171,428.40 is: 257,151.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,892.40 : 493,354.80 = 171,428.40 : x
  2. Step 2: Convert to fraction form
    328,892.40/493,354.80 = 171,428.40/x
  3. Step 3: Cross multiply
    328,892.40x = 493,354.80 × 171,428.40
  4. Step 4: Simplify right side
    328,892.40x = 84,575,023,996.32
  5. Step 5: Solve for x
    x = 84,575,023,996.32/328,892.40
  6. Step 6: Final answer
    x = 257,151.04

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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.