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Finding the Fourth Proportional to 715.95, 988.31 and 436.28

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Solution

The fourth proportional to 715.95, 988.31 and 436.28 is: 602.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.95 : 988.31 = 436.28 : x
  2. Step 2: Convert to fraction form
    715.95/988.31 = 436.28/x
  3. Step 3: Cross multiply
    715.95x = 988.31 × 436.28
  4. Step 4: Simplify right side
    715.95x = 431,172.76
  5. Step 5: Solve for x
    x = 431,172.76/715.95
  6. Step 6: Final answer
    x = 602.24

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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.