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Finding the Fourth Proportional to 904.17, 1,355.21 and 416.21

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Solution

The fourth proportional to 904.17, 1,355.21 and 416.21 is: 623.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.17 : 1,355.21 = 416.21 : x
  2. Step 2: Convert to fraction form
    904.17/1,355.21 = 416.21/x
  3. Step 3: Cross multiply
    904.17x = 1,355.21 × 416.21
  4. Step 4: Simplify right side
    904.17x = 564,044.66
  5. Step 5: Solve for x
    x = 564,044.66/904.17
  6. Step 6: Final answer
    x = 623.82

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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.