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Finding the Fourth Proportional to 715.42, 1,067.37 and 637.45

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Solution

The fourth proportional to 715.42, 1,067.37 and 637.45 is: 951.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.42 : 1,067.37 = 637.45 : x
  2. Step 2: Convert to fraction form
    715.42/1,067.37 = 637.45/x
  3. Step 3: Cross multiply
    715.42x = 1,067.37 × 637.45
  4. Step 4: Simplify right side
    715.42x = 680,395.01
  5. Step 5: Solve for x
    x = 680,395.01/715.42
  6. Step 6: Final answer
    x = 951.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.