Home / 1,046.39-1,569.28-421.69

Finding the Fourth Proportional to 1,046.39, 1,569.28 and 421.69

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Solution

The fourth proportional to 1,046.39, 1,569.28 and 421.69 is: 632.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,046.39 : 1,569.28 = 421.69 : x
  2. Step 2: Convert to fraction form
    1,046.39/1,569.28 = 421.69/x
  3. Step 3: Cross multiply
    1,046.39x = 1,569.28 × 421.69
  4. Step 4: Simplify right side
    1,046.39x = 661,749.68
  5. Step 5: Solve for x
    x = 661,749.68/1,046.39
  6. Step 6: Final answer
    x = 632.41

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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.