Home / 427,684.12-640,248-258,693.04

Finding the Fourth Proportional to 427,684.12, 640,248 and 258,693.04

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Solution

The fourth proportional to 427,684.12, 640,248 and 258,693.04 is: 387,266.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,684.12 : 640,248 = 258,693.04 : x
  2. Step 2: Convert to fraction form
    427,684.12/640,248 = 258,693.04/x
  3. Step 3: Cross multiply
    427,684.12x = 640,248 × 258,693.04
  4. Step 4: Simplify right side
    427,684.12x = 165,627,701,473.92
  5. Step 5: Solve for x
    x = 165,627,701,473.92/427,684.12
  6. Step 6: Final answer
    x = 387,266.43

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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.