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Finding the Fourth Proportional to 290,538.40, 400,990.64 and 242,063.56

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Solution

The fourth proportional to 290,538.40, 400,990.64 and 242,063.56 is: 334,087.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,538.40 : 400,990.64 = 242,063.56 : x
  2. Step 2: Convert to fraction form
    290,538.40/400,990.64 = 242,063.56/x
  3. Step 3: Cross multiply
    290,538.40x = 400,990.64 × 242,063.56
  4. Step 4: Simplify right side
    290,538.40x = 97,065,221,845.08
  5. Step 5: Solve for x
    x = 97,065,221,845.08/290,538.40
  6. Step 6: Final answer
    x = 334,087.41

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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.