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Finding the Fourth Proportional to 723,787.28, 998,745.84 and 401,416.56

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Solution

The fourth proportional to 723,787.28, 998,745.84 and 401,416.56 is: 553,910.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,787.28 : 998,745.84 = 401,416.56 : x
  2. Step 2: Convert to fraction form
    723,787.28/998,745.84 = 401,416.56/x
  3. Step 3: Cross multiply
    723,787.28x = 998,745.84 × 401,416.56
  4. Step 4: Simplify right side
    723,787.28x = 400,913,119,407.11
  5. Step 5: Solve for x
    x = 400,913,119,407.11/723,787.28
  6. Step 6: Final answer
    x = 553,910.15

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1.5x scale

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.