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Finding the Fourth Proportional to 391,661.06, 540,491.33 and 221,895.18

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Solution

The fourth proportional to 391,661.06, 540,491.33 and 221,895.18 is: 306,214.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,661.06 : 540,491.33 = 221,895.18 : x
  2. Step 2: Convert to fraction form
    391,661.06/540,491.33 = 221,895.18/x
  3. Step 3: Cross multiply
    391,661.06x = 540,491.33 × 221,895.18
  4. Step 4: Simplify right side
    391,661.06x = 119,932,421,513.53
  5. Step 5: Solve for x
    x = 119,932,421,513.53/391,661.06
  6. Step 6: Final answer
    x = 306,214.83

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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.