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Finding the Fourth Proportional to 391,523.41, 540,353.69 and 221,763.25

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Solution

The fourth proportional to 391,523.41, 540,353.69 and 221,763.25 is: 306,062.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,523.41 : 540,353.69 = 221,763.25 : x
  2. Step 2: Convert to fraction form
    391,523.41/540,353.69 = 221,763.25/x
  3. Step 3: Cross multiply
    391,523.41x = 540,353.69 × 221,763.25
  4. Step 4: Simplify right side
    391,523.41x = 119,830,590,443.89
  5. Step 5: Solve for x
    x = 119,830,590,443.89/391,523.41
  6. Step 6: Final answer
    x = 306,062.39

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1.5x scale

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.