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Finding the Fourth Proportional to 715.68, 985.68 and 604.80

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Solution

The fourth proportional to 715.68, 985.68 and 604.80 is: 832.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.68 : 985.68 = 604.80 : x
  2. Step 2: Convert to fraction form
    715.68/985.68 = 604.80/x
  3. Step 3: Cross multiply
    715.68x = 985.68 × 604.80
  4. Step 4: Simplify right side
    715.68x = 596,139.26
  5. Step 5: Solve for x
    x = 596,139.26/715.68
  6. Step 6: Final answer
    x = 832.97

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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.