Home / 428,488.36-642,531.09-158,429.91

Finding the Fourth Proportional to 428,488.36, 642,531.09 and 158,429.91

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Solution

The fourth proportional to 428,488.36, 642,531.09 and 158,429.91 is: 237,570.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,488.36 : 642,531.09 = 158,429.91 : x
  2. Step 2: Convert to fraction form
    428,488.36/642,531.09 = 158,429.91/x
  3. Step 3: Cross multiply
    428,488.36x = 642,531.09 × 158,429.91
  4. Step 4: Simplify right side
    428,488.36x = 101,796,143,057.96
  5. Step 5: Solve for x
    x = 101,796,143,057.96/428,488.36
  6. Step 6: Final answer
    x = 237,570.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.