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Finding the Fourth Proportional to 715.16, 985.37 and 548.84

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Solution

The fourth proportional to 715.16, 985.37 and 548.84 is: 756.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.16 : 985.37 = 548.84 : x
  2. Step 2: Convert to fraction form
    715.16/985.37 = 548.84/x
  3. Step 3: Cross multiply
    715.16x = 985.37 × 548.84
  4. Step 4: Simplify right side
    715.16x = 540,810.19
  5. Step 5: Solve for x
    x = 540,810.19/715.16
  6. Step 6: Final answer
    x = 756.21

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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.