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Finding the Fourth Proportional to 393,294.42, 543,280.53 and 308,326.13

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Solution

The fourth proportional to 393,294.42, 543,280.53 and 308,326.13 is: 425,908.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,294.42 : 543,280.53 = 308,326.13 : x
  2. Step 2: Convert to fraction form
    393,294.42/543,280.53 = 308,326.13/x
  3. Step 3: Cross multiply
    393,294.42x = 543,280.53 × 308,326.13
  4. Step 4: Simplify right side
    393,294.42x = 167,507,583,796.37
  5. Step 5: Solve for x
    x = 167,507,583,796.37/393,294.42
  6. Step 6: Final answer
    x = 425,908.87

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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.