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Finding the Fourth Proportional to 553,723.17, 764,306.87 and 321,208.87

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Solution

The fourth proportional to 553,723.17, 764,306.87 and 321,208.87 is: 443,366.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,723.17 : 764,306.87 = 321,208.87 : x
  2. Step 2: Convert to fraction form
    553,723.17/764,306.87 = 321,208.87/x
  3. Step 3: Cross multiply
    553,723.17x = 764,306.87 × 321,208.87
  4. Step 4: Simplify right side
    553,723.17x = 245,502,143,962.20
  5. Step 5: Solve for x
    x = 245,502,143,962.20/553,723.17
  6. Step 6: Final answer
    x = 443,366.21

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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.