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Finding the Fourth Proportional to 288,619.26, 398,421.04 and 220,639.10

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Solution

The fourth proportional to 288,619.26, 398,421.04 and 220,639.10 is: 304,578.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,619.26 : 398,421.04 = 220,639.10 : x
  2. Step 2: Convert to fraction form
    288,619.26/398,421.04 = 220,639.10/x
  3. Step 3: Cross multiply
    288,619.26x = 398,421.04 × 220,639.10
  4. Step 4: Simplify right side
    288,619.26x = 87,907,259,686.66
  5. Step 5: Solve for x
    x = 87,907,259,686.66/288,619.26
  6. Step 6: Final answer
    x = 304,578.63

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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.