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Finding the Fourth Proportional to 400,961, 553,326.18 and 222,113

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Solution

The fourth proportional to 400,961, 553,326.18 and 222,113 is: 306,515.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,961 : 553,326.18 = 222,113 : x
  2. Step 2: Convert to fraction form
    400,961/553,326.18 = 222,113/x
  3. Step 3: Cross multiply
    400,961x = 553,326.18 × 222,113
  4. Step 4: Simplify right side
    400,961x = 122,900,937,818.34
  5. Step 5: Solve for x
    x = 122,900,937,818.34/400,961
  6. Step 6: Final answer
    x = 306,515.94

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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.