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Finding the Fourth Proportional to 251,065.32, 378,325.05 and 207,668.76

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Solution

The fourth proportional to 251,065.32, 378,325.05 and 207,668.76 is: 312,931.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,065.32 : 378,325.05 = 207,668.76 : x
  2. Step 2: Convert to fraction form
    251,065.32/378,325.05 = 207,668.76/x
  3. Step 3: Cross multiply
    251,065.32x = 378,325.05 × 207,668.76
  4. Step 4: Simplify right side
    251,065.32x = 78,566,294,010.44
  5. Step 5: Solve for x
    x = 78,566,294,010.44/251,065.32
  6. Step 6: Final answer
    x = 312,931.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.