Home / 427,215.29-640,886.65-157,322.66

Finding the Fourth Proportional to 427,215.29, 640,886.65 and 157,322.66

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Solution

The fourth proportional to 427,215.29, 640,886.65 and 157,322.66 is: 236,007.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,215.29 : 640,886.65 = 157,322.66 : x
  2. Step 2: Convert to fraction form
    427,215.29/640,886.65 = 157,322.66/x
  3. Step 3: Cross multiply
    427,215.29x = 640,886.65 × 157,322.66
  4. Step 4: Simplify right side
    427,215.29x = 100,825,993,745.40
  5. Step 5: Solve for x
    x = 100,825,993,745.40/427,215.29
  6. Step 6: Final answer
    x = 236,007.45

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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.