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Finding the Fourth Proportional to 553,248.73, 763,556 and 311,578.54

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Solution

The fourth proportional to 553,248.73, 763,556 and 311,578.54 is: 430,019.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,248.73 : 763,556 = 311,578.54 : x
  2. Step 2: Convert to fraction form
    553,248.73/763,556 = 311,578.54/x
  3. Step 3: Cross multiply
    553,248.73x = 763,556 × 311,578.54
  4. Step 4: Simplify right side
    553,248.73x = 237,907,663,688.24
  5. Step 5: Solve for x
    x = 237,907,663,688.24/553,248.73
  6. Step 6: Final answer
    x = 430,019.36

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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.