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Finding the Fourth Proportional to 936.77, 1,404.95 and 474.26

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Solution

The fourth proportional to 936.77, 1,404.95 and 474.26 is: 711.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.77 : 1,404.95 = 474.26 : x
  2. Step 2: Convert to fraction form
    936.77/1,404.95 = 474.26/x
  3. Step 3: Cross multiply
    936.77x = 1,404.95 × 474.26
  4. Step 4: Simplify right side
    936.77x = 666,302.19
  5. Step 5: Solve for x
    x = 666,302.19/936.77
  6. Step 6: Final answer
    x = 711.28

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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.