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Finding the Fourth Proportional to 319,101.30, 478,421.55 and 178,902.90

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Solution

The fourth proportional to 319,101.30, 478,421.55 and 178,902.90 is: 268,225.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,101.30 : 478,421.55 = 178,902.90 : x
  2. Step 2: Convert to fraction form
    319,101.30/478,421.55 = 178,902.90/x
  3. Step 3: Cross multiply
    319,101.30x = 478,421.55 × 178,902.90
  4. Step 4: Simplify right side
    319,101.30x = 85,591,002,717.50
  5. Step 5: Solve for x
    x = 85,591,002,717.50/319,101.30
  6. Step 6: Final answer
    x = 268,225.18

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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.