Home / 431,723.60-647,585.40-326,747.60

Finding the Fourth Proportional to 431,723.60, 647,585.40 and 326,747.60

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Solution

The fourth proportional to 431,723.60, 647,585.40 and 326,747.60 is: 490,121.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,723.60 : 647,585.40 = 326,747.60 : x
  2. Step 2: Convert to fraction form
    431,723.60/647,585.40 = 326,747.60/x
  3. Step 3: Cross multiply
    431,723.60x = 647,585.40 × 326,747.60
  4. Step 4: Simplify right side
    431,723.60x = 211,596,975,245.04
  5. Step 5: Solve for x
    x = 211,596,975,245.04/431,723.60
  6. Step 6: Final answer
    x = 490,121.40

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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.