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Finding the Fourth Proportional to 641,728.64, 885,596 and 351,335.36

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Solution

The fourth proportional to 641,728.64, 885,596 and 351,335.36 is: 484,848.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,728.64 : 885,596 = 351,335.36 : x
  2. Step 2: Convert to fraction form
    641,728.64/885,596 = 351,335.36/x
  3. Step 3: Cross multiply
    641,728.64x = 885,596 × 351,335.36
  4. Step 4: Simplify right side
    641,728.64x = 311,141,189,474.56
  5. Step 5: Solve for x
    x = 311,141,189,474.56/641,728.64
  6. Step 6: Final answer
    x = 484,848.53

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1.5x scale

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.