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Finding the Fourth Proportional to 674,641.44, 930,968.64 and 372,816

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Solution

The fourth proportional to 674,641.44, 930,968.64 and 372,816 is: 514,465.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,641.44 : 930,968.64 = 372,816 : x
  2. Step 2: Convert to fraction form
    674,641.44/930,968.64 = 372,816/x
  3. Step 3: Cross multiply
    674,641.44x = 930,968.64 × 372,816
  4. Step 4: Simplify right side
    674,641.44x = 347,080,004,490.24
  5. Step 5: Solve for x
    x = 347,080,004,490.24/674,641.44
  6. Step 6: Final answer
    x = 514,465.88

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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.