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Finding the Fourth Proportional to 723,631.12, 998,672.25 and 401,445

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Solution

The fourth proportional to 723,631.12, 998,672.25 and 401,445 is: 554,028.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,631.12 : 998,672.25 = 401,445 : x
  2. Step 2: Convert to fraction form
    723,631.12/998,672.25 = 401,445/x
  3. Step 3: Cross multiply
    723,631.12x = 998,672.25 × 401,445
  4. Step 4: Simplify right side
    723,631.12x = 400,911,982,906.67
  5. Step 5: Solve for x
    x = 400,911,982,906.67/723,631.12
  6. Step 6: Final answer
    x = 554,028.11

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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.