Home / 427,686.12-640,251-258,695.04

Finding the Fourth Proportional to 427,686.12, 640,251 and 258,695.04

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Solution

The fourth proportional to 427,686.12, 640,251 and 258,695.04 is: 387,269.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,686.12 : 640,251 = 258,695.04 : x
  2. Step 2: Convert to fraction form
    427,686.12/640,251 = 258,695.04/x
  3. Step 3: Cross multiply
    427,686.12x = 640,251 × 258,695.04
  4. Step 4: Simplify right side
    427,686.12x = 165,629,758,055.04
  5. Step 5: Solve for x
    x = 165,629,758,055.04/427,686.12
  6. Step 6: Final answer
    x = 387,269.43

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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.