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Finding the Fourth Proportional to 312,519.60, 431,246.16 and 174,672.72

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Solution

The fourth proportional to 312,519.60, 431,246.16 and 174,672.72 is: 241,031.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,519.60 : 431,246.16 = 174,672.72 : x
  2. Step 2: Convert to fraction form
    312,519.60/431,246.16 = 174,672.72/x
  3. Step 3: Cross multiply
    312,519.60x = 431,246.16 × 174,672.72
  4. Step 4: Simplify right side
    312,519.60x = 75,326,939,756.76
  5. Step 5: Solve for x
    x = 75,326,939,756.76/312,519.60
  6. Step 6: Final answer
    x = 241,031.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.