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Finding the Fourth Proportional to 715.91, 988.01 and 436.07

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Solution

The fourth proportional to 715.91, 988.01 and 436.07 is: 601.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.91 : 988.01 = 436.07 : x
  2. Step 2: Convert to fraction form
    715.91/988.01 = 436.07/x
  3. Step 3: Cross multiply
    715.91x = 988.01 × 436.07
  4. Step 4: Simplify right side
    715.91x = 430,845.08
  5. Step 5: Solve for x
    x = 430,845.08/715.91
  6. Step 6: Final answer
    x = 601.82

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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.