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Finding the Fourth Proportional to 553,247.73, 763,554.62 and 311,577.54

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Solution

The fourth proportional to 553,247.73, 763,554.62 and 311,577.54 is: 430,017.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,247.73 : 763,554.62 = 311,577.54 : x
  2. Step 2: Convert to fraction form
    553,247.73/763,554.62 = 311,577.54/x
  3. Step 3: Cross multiply
    553,247.73x = 763,554.62 × 311,577.54
  4. Step 4: Simplify right side
    553,247.73x = 237,906,468,597.35
  5. Step 5: Solve for x
    x = 237,906,468,597.35/553,247.73
  6. Step 6: Final answer
    x = 430,017.98

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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.