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Finding the Fourth Proportional to 903.42, 1,355.64 and 416.47

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Solution

The fourth proportional to 903.42, 1,355.64 and 416.47 is: 624.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.42 : 1,355.64 = 416.47 : x
  2. Step 2: Convert to fraction form
    903.42/1,355.64 = 416.47/x
  3. Step 3: Cross multiply
    903.42x = 1,355.64 × 416.47
  4. Step 4: Simplify right side
    903.42x = 564,583.43
  5. Step 5: Solve for x
    x = 564,583.43/903.42
  6. Step 6: Final answer
    x = 624.94

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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.