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Finding the Fourth Proportional to 674,684.53, 931,099.31 and 388,247.47

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Solution

The fourth proportional to 674,684.53, 931,099.31 and 388,247.47 is: 535,801.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,684.53 : 931,099.31 = 388,247.47 : x
  2. Step 2: Convert to fraction form
    674,684.53/931,099.31 = 388,247.47/x
  3. Step 3: Cross multiply
    674,684.53x = 931,099.31 × 388,247.47
  4. Step 4: Simplify right side
    674,684.53x = 361,496,951,426.25
  5. Step 5: Solve for x
    x = 361,496,951,426.25/674,684.53
  6. Step 6: Final answer
    x = 535,801.45

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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.