Home / 665,424.60-918,284.94-378,944.88

Finding the Fourth Proportional to 665,424.60, 918,284.94 and 378,944.88

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Solution

The fourth proportional to 665,424.60, 918,284.94 and 378,944.88 is: 522,943.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,424.60 : 918,284.94 = 378,944.88 : x
  2. Step 2: Convert to fraction form
    665,424.60/918,284.94 = 378,944.88/x
  3. Step 3: Cross multiply
    665,424.60x = 918,284.94 × 378,944.88
  4. Step 4: Simplify right side
    665,424.60x = 347,979,376,394.11
  5. Step 5: Solve for x
    x = 347,979,376,394.11/665,424.60
  6. Step 6: Final answer
    x = 522,943.36

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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.