Home / 310,659.09-428,823.95-272,821.61

Finding the Fourth Proportional to 310,659.09, 428,823.95 and 272,821.61

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Solution

The fourth proportional to 310,659.09, 428,823.95 and 272,821.61 is: 376,594.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,659.09 : 428,823.95 = 272,821.61 : x
  2. Step 2: Convert to fraction form
    310,659.09/428,823.95 = 272,821.61/x
  3. Step 3: Cross multiply
    310,659.09x = 428,823.95 × 272,821.61
  4. Step 4: Simplify right side
    310,659.09x = 116,992,436,937.33
  5. Step 5: Solve for x
    x = 116,992,436,937.33/310,659.09
  6. Step 6: Final answer
    x = 376,594.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.