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Finding the Fourth Proportional to 386,689.29, 533,695.35 and 225,544.33

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Solution

The fourth proportional to 386,689.29, 533,695.35 and 225,544.33 is: 311,288.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,689.29 : 533,695.35 = 225,544.33 : x
  2. Step 2: Convert to fraction form
    386,689.29/533,695.35 = 225,544.33/x
  3. Step 3: Cross multiply
    386,689.29x = 533,695.35 × 225,544.33
  4. Step 4: Simplify right side
    386,689.29x = 120,371,960,139.87
  5. Step 5: Solve for x
    x = 120,371,960,139.87/386,689.29
  6. Step 6: Final answer
    x = 311,288.58

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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.