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Finding the Fourth Proportional to 665,356.64, 918,191.24 and 378,876.71

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Solution

The fourth proportional to 665,356.64, 918,191.24 and 378,876.71 is: 522,849.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,356.64 : 918,191.24 = 378,876.71 : x
  2. Step 2: Convert to fraction form
    665,356.64/918,191.24 = 378,876.71/x
  3. Step 3: Cross multiply
    665,356.64x = 918,191.24 × 378,876.71
  4. Step 4: Simplify right side
    665,356.64x = 347,881,276,563.12
  5. Step 5: Solve for x
    x = 347,881,276,563.12/665,356.64
  6. Step 6: Final answer
    x = 522,849.34

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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.