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Finding the Fourth Proportional to 665,362.56, 918,089.28 and 378,887.04

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Solution

The fourth proportional to 665,362.56, 918,089.28 and 378,887.04 is: 522,800.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,362.56 : 918,089.28 = 378,887.04 : x
  2. Step 2: Convert to fraction form
    665,362.56/918,089.28 = 378,887.04/x
  3. Step 3: Cross multiply
    665,362.56x = 918,089.28 × 378,887.04
  4. Step 4: Simplify right side
    665,362.56x = 347,852,129,754.93
  5. Step 5: Solve for x
    x = 347,852,129,754.93/665,362.56
  6. Step 6: Final answer
    x = 522,800.88

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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.