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Finding the Fourth Proportional to 404.02, 560.15 and 396.10

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Solution

The fourth proportional to 404.02, 560.15 and 396.10 is: 549.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.02 : 560.15 = 396.10 : x
  2. Step 2: Convert to fraction form
    404.02/560.15 = 396.10/x
  3. Step 3: Cross multiply
    404.02x = 560.15 × 396.10
  4. Step 4: Simplify right side
    404.02x = 221,875.42
  5. Step 5: Solve for x
    x = 221,875.42/404.02
  6. Step 6: Final answer
    x = 549.17

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.