Home / 328,031.20-491,979.60-91,314.40

Finding the Fourth Proportional to 328,031.20, 491,979.60 and 91,314.40

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Solution

The fourth proportional to 328,031.20, 491,979.60 and 91,314.40 is: 136,952.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,031.20 : 491,979.60 = 91,314.40 : x
  2. Step 2: Convert to fraction form
    328,031.20/491,979.60 = 91,314.40/x
  3. Step 3: Cross multiply
    328,031.20x = 491,979.60 × 91,314.40
  4. Step 4: Simplify right side
    328,031.20x = 44,924,821,986.24
  5. Step 5: Solve for x
    x = 44,924,821,986.24/328,031.20
  6. Step 6: Final answer
    x = 136,952.89

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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.