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Finding the Fourth Proportional to 936.63, 1,405.01 and 474.32

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Solution

The fourth proportional to 936.63, 1,405.01 and 474.32 is: 711.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.63 : 1,405.01 = 474.32 : x
  2. Step 2: Convert to fraction form
    936.63/1,405.01 = 474.32/x
  3. Step 3: Cross multiply
    936.63x = 1,405.01 × 474.32
  4. Step 4: Simplify right side
    936.63x = 666,429.04
  5. Step 5: Solve for x
    x = 666,429.04/936.63
  6. Step 6: Final answer
    x = 711.52

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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.