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Finding the Fourth Proportional to 1,205.07, 1,807.38 and 474.27

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Solution

The fourth proportional to 1,205.07, 1,807.38 and 474.27 is: 711.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,205.07 : 1,807.38 = 474.27 : x
  2. Step 2: Convert to fraction form
    1,205.07/1,807.38 = 474.27/x
  3. Step 3: Cross multiply
    1,205.07x = 1,807.38 × 474.27
  4. Step 4: Simplify right side
    1,205.07x = 857,186.11
  5. Step 5: Solve for x
    x = 857,186.11/1,205.07
  6. Step 6: Final answer
    x = 711.32

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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.