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Finding the Fourth Proportional to 913.59, 1,370.22 and 297.12

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Solution

The fourth proportional to 913.59, 1,370.22 and 297.12 is: 445.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.59 : 1,370.22 = 297.12 : x
  2. Step 2: Convert to fraction form
    913.59/1,370.22 = 297.12/x
  3. Step 3: Cross multiply
    913.59x = 1,370.22 × 297.12
  4. Step 4: Simplify right side
    913.59x = 407,119.77
  5. Step 5: Solve for x
    x = 407,119.77/913.59
  6. Step 6: Final answer
    x = 445.63

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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.