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Finding the Fourth Proportional to 715,741, 987,735.06 and 393,464.68

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Solution

The fourth proportional to 715,741, 987,735.06 and 393,464.68 is: 542,988.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,741 : 987,735.06 = 393,464.68 : x
  2. Step 2: Convert to fraction form
    715,741/987,735.06 = 393,464.68/x
  3. Step 3: Cross multiply
    715,741x = 987,735.06 × 393,464.68
  4. Step 4: Simplify right side
    715,741x = 388,638,859,307.68
  5. Step 5: Solve for x
    x = 388,638,859,307.68/715,741
  6. Step 6: Final answer
    x = 542,988.12

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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.