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Finding the Fourth Proportional to 328,030.20, 491,978.10 and 91,313.40

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Solution

The fourth proportional to 328,030.20, 491,978.10 and 91,313.40 is: 136,951.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,030.20 : 491,978.10 = 91,313.40 : x
  2. Step 2: Convert to fraction form
    328,030.20/491,978.10 = 91,313.40/x
  3. Step 3: Cross multiply
    328,030.20x = 491,978.10 × 91,313.40
  4. Step 4: Simplify right side
    328,030.20x = 44,924,193,036.54
  5. Step 5: Solve for x
    x = 44,924,193,036.54/328,030.20
  6. Step 6: Final answer
    x = 136,951.39

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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.