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Finding the Fourth Proportional to 553,320.73, 763,596.84 and 311,611.67

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Solution

The fourth proportional to 553,320.73, 763,596.84 and 311,611.67 is: 430,032.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,320.73 : 763,596.84 = 311,611.67 : x
  2. Step 2: Convert to fraction form
    553,320.73/763,596.84 = 311,611.67/x
  3. Step 3: Cross multiply
    553,320.73x = 763,596.84 × 311,611.67
  4. Step 4: Simplify right side
    553,320.73x = 237,945,681,143.08
  5. Step 5: Solve for x
    x = 237,945,681,143.08/553,320.73
  6. Step 6: Final answer
    x = 430,032.11

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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.