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Finding the Fourth Proportional to 1,077.81, 1,487.38 and 605.72

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Solution

The fourth proportional to 1,077.81, 1,487.38 and 605.72 is: 835.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,077.81 : 1,487.38 = 605.72 : x
  2. Step 2: Convert to fraction form
    1,077.81/1,487.38 = 605.72/x
  3. Step 3: Cross multiply
    1,077.81x = 1,487.38 × 605.72
  4. Step 4: Simplify right side
    1,077.81x = 900,925.35
  5. Step 5: Solve for x
    x = 900,925.35/1,077.81
  6. Step 6: Final answer
    x = 835.89

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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.