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Finding the Fourth Proportional to 940.68, 1,298.22 and 567.72

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Solution

The fourth proportional to 940.68, 1,298.22 and 567.72 is: 783.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.68 : 1,298.22 = 567.72 : x
  2. Step 2: Convert to fraction form
    940.68/1,298.22 = 567.72/x
  3. Step 3: Cross multiply
    940.68x = 1,298.22 × 567.72
  4. Step 4: Simplify right side
    940.68x = 737,025.46
  5. Step 5: Solve for x
    x = 737,025.46/940.68
  6. Step 6: Final answer
    x = 783.50

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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.