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Finding the Fourth Proportional to 981.64, 1,473 and 404.56

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Solution

The fourth proportional to 981.64, 1,473 and 404.56 is: 607.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    981.64 : 1,473 = 404.56 : x
  2. Step 2: Convert to fraction form
    981.64/1,473 = 404.56/x
  3. Step 3: Cross multiply
    981.64x = 1,473 × 404.56
  4. Step 4: Simplify right side
    981.64x = 595,916.88
  5. Step 5: Solve for x
    x = 595,916.88/981.64
  6. Step 6: Final answer
    x = 607.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.