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Finding the Fourth Proportional to 715,950.31, 988,011.22 and 393,681.28

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Solution

The fourth proportional to 715,950.31, 988,011.22 and 393,681.28 is: 543,280.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,950.31 : 988,011.22 = 393,681.28 : x
  2. Step 2: Convert to fraction form
    715,950.31/988,011.22 = 393,681.28/x
  3. Step 3: Cross multiply
    715,950.31x = 988,011.22 × 393,681.28
  4. Step 4: Simplify right side
    715,950.31x = 388,961,520,880.40
  5. Step 5: Solve for x
    x = 388,961,520,880.40/715,950.31
  6. Step 6: Final answer
    x = 543,280.05

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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.