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Finding the Fourth Proportional to 715.88, 987.36 and 436.16

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Solution

The fourth proportional to 715.88, 987.36 and 436.16 is: 601.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.88 : 987.36 = 436.16 : x
  2. Step 2: Convert to fraction form
    715.88/987.36 = 436.16/x
  3. Step 3: Cross multiply
    715.88x = 987.36 × 436.16
  4. Step 4: Simplify right side
    715.88x = 430,646.94
  5. Step 5: Solve for x
    x = 430,646.94/715.88
  6. Step 6: Final answer
    x = 601.56

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.