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Finding the Fourth Proportional to 553,882.56, 764,335.84 and 312,215.28

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Solution

The fourth proportional to 553,882.56, 764,335.84 and 312,215.28 is: 430,844.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,882.56 : 764,335.84 = 312,215.28 : x
  2. Step 2: Convert to fraction form
    553,882.56/764,335.84 = 312,215.28/x
  3. Step 3: Cross multiply
    553,882.56x = 764,335.84 × 312,215.28
  4. Step 4: Simplify right side
    553,882.56x = 238,637,328,299.64
  5. Step 5: Solve for x
    x = 238,637,328,299.64/553,882.56
  6. Step 6: Final answer
    x = 430,844.63

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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.