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Finding the Fourth Proportional to 1,071.12, 1,477.92 and 605.28

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Solution

The fourth proportional to 1,071.12, 1,477.92 and 605.28 is: 835.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,071.12 : 1,477.92 = 605.28 : x
  2. Step 2: Convert to fraction form
    1,071.12/1,477.92 = 605.28/x
  3. Step 3: Cross multiply
    1,071.12x = 1,477.92 × 605.28
  4. Step 4: Simplify right side
    1,071.12x = 894,555.42
  5. Step 5: Solve for x
    x = 894,555.42/1,071.12
  6. Step 6: Final answer
    x = 835.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.