Home / 378,172.64-521,889.18-208,417.70

Finding the Fourth Proportional to 378,172.64, 521,889.18 and 208,417.70

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Solution

The fourth proportional to 378,172.64, 521,889.18 and 208,417.70 is: 287,622.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,172.64 : 521,889.18 = 208,417.70 : x
  2. Step 2: Convert to fraction form
    378,172.64/521,889.18 = 208,417.70/x
  3. Step 3: Cross multiply
    378,172.64x = 521,889.18 × 208,417.70
  4. Step 4: Simplify right side
    378,172.64x = 108,770,942,550.49
  5. Step 5: Solve for x
    x = 108,770,942,550.49/378,172.64
  6. Step 6: Final answer
    x = 287,622.45

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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.