Home / 427,839.78-642,390.47-238,669.75

Finding the Fourth Proportional to 427,839.78, 642,390.47 and 238,669.75

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Solution

The fourth proportional to 427,839.78, 642,390.47 and 238,669.75 is: 358,356.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,839.78 : 642,390.47 = 238,669.75 : x
  2. Step 2: Convert to fraction form
    427,839.78/642,390.47 = 238,669.75/x
  3. Step 3: Cross multiply
    427,839.78x = 642,390.47 × 238,669.75
  4. Step 4: Simplify right side
    427,839.78x = 153,319,172,877.28
  5. Step 5: Solve for x
    x = 153,319,172,877.28/427,839.78
  6. Step 6: Final answer
    x = 358,356.52

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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.