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Finding the Fourth Proportional to 718.14, 1,078.29 and 637.50

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Solution

The fourth proportional to 718.14, 1,078.29 and 637.50 is: 957.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.14 : 1,078.29 = 637.50 : x
  2. Step 2: Convert to fraction form
    718.14/1,078.29 = 637.50/x
  3. Step 3: Cross multiply
    718.14x = 1,078.29 × 637.50
  4. Step 4: Simplify right side
    718.14x = 687,409.88
  5. Step 5: Solve for x
    x = 687,409.88/718.14
  6. Step 6: Final answer
    x = 957.21

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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.