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Finding the Fourth Proportional to 391,601.72, 540,437.10 and 221,837.24

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Solution

The fourth proportional to 391,601.72, 540,437.10 and 221,837.24 is: 306,150.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,601.72 : 540,437.10 = 221,837.24 : x
  2. Step 2: Convert to fraction form
    391,601.72/540,437.10 = 221,837.24/x
  3. Step 3: Cross multiply
    391,601.72x = 540,437.10 × 221,837.24
  4. Step 4: Simplify right side
    391,601.72x = 119,889,074,657.60
  5. Step 5: Solve for x
    x = 119,889,074,657.60/391,601.72
  6. Step 6: Final answer
    x = 306,150.53

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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.