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Finding the Fourth Proportional to 715,999.16, 988,052.28 and 393,690.08

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Solution

The fourth proportional to 715,999.16, 988,052.28 and 393,690.08 is: 543,277.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,999.16 : 988,052.28 = 393,690.08 : x
  2. Step 2: Convert to fraction form
    715,999.16/988,052.28 = 393,690.08/x
  3. Step 3: Cross multiply
    715,999.16x = 988,052.28 × 393,690.08
  4. Step 4: Simplify right side
    715,999.16x = 388,986,381,157.38
  5. Step 5: Solve for x
    x = 388,986,381,157.38/715,999.16
  6. Step 6: Final answer
    x = 543,277.71

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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.