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Finding the Fourth Proportional to 663,653.31, 915,728.38 and 373,189.64

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Solution

The fourth proportional to 663,653.31, 915,728.38 and 373,189.64 is: 514,938.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,653.31 : 915,728.38 = 373,189.64 : x
  2. Step 2: Convert to fraction form
    663,653.31/915,728.38 = 373,189.64/x
  3. Step 3: Cross multiply
    663,653.31x = 915,728.38 × 373,189.64
  4. Step 4: Simplify right side
    663,653.31x = 341,740,344,469.98
  5. Step 5: Solve for x
    x = 341,740,344,469.98/663,653.31
  6. Step 6: Final answer
    x = 514,938.05

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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.