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Finding the Fourth Proportional to 391,597.46, 540,386.25 and 221,832.98

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Solution

The fourth proportional to 391,597.46, 540,386.25 and 221,832.98 is: 306,119.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,597.46 : 540,386.25 = 221,832.98 : x
  2. Step 2: Convert to fraction form
    391,597.46/540,386.25 = 221,832.98/x
  3. Step 3: Cross multiply
    391,597.46x = 540,386.25 × 221,832.98
  4. Step 4: Simplify right side
    391,597.46x = 119,875,492,188.53
  5. Step 5: Solve for x
    x = 119,875,492,188.53/391,597.46
  6. Step 6: Final answer
    x = 306,119.18

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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.