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Finding the Fourth Proportional to 553,848.47, 764,311.95 and 321,320.55

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Solution

The fourth proportional to 553,848.47, 764,311.95 and 321,320.55 is: 443,422.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,848.47 : 764,311.95 = 321,320.55 : x
  2. Step 2: Convert to fraction form
    553,848.47/764,311.95 = 321,320.55/x
  3. Step 3: Cross multiply
    553,848.47x = 764,311.95 × 321,320.55
  4. Step 4: Simplify right side
    553,848.47x = 245,589,136,145.57
  5. Step 5: Solve for x
    x = 245,589,136,145.57/553,848.47
  6. Step 6: Final answer
    x = 443,422.98

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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.