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Finding the Fourth Proportional to 903.93, 1,356.48 and 417.03

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Solution

The fourth proportional to 903.93, 1,356.48 and 417.03 is: 625.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.93 : 1,356.48 = 417.03 : x
  2. Step 2: Convert to fraction form
    903.93/1,356.48 = 417.03/x
  3. Step 3: Cross multiply
    903.93x = 1,356.48 × 417.03
  4. Step 4: Simplify right side
    903.93x = 565,692.85
  5. Step 5: Solve for x
    x = 565,692.85/903.93
  6. Step 6: Final answer
    x = 625.81

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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.