Home / 378,128.81-521,828.71-208,373.87

Finding the Fourth Proportional to 378,128.81, 521,828.71 and 208,373.87

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Solution

The fourth proportional to 378,128.81, 521,828.71 and 208,373.87 is: 287,561.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,128.81 : 521,828.71 = 208,373.87 : x
  2. Step 2: Convert to fraction form
    378,128.81/521,828.71 = 208,373.87/x
  3. Step 3: Cross multiply
    378,128.81x = 521,828.71 × 208,373.87
  4. Step 4: Simplify right side
    378,128.81x = 108,735,468,563.45
  5. Step 5: Solve for x
    x = 108,735,468,563.45/378,128.81
  6. Step 6: Final answer
    x = 287,561.98

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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.