Home / 432,428.14-648,642.21-128,826.91

Finding the Fourth Proportional to 432,428.14, 648,642.21 and 128,826.91

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Solution

The fourth proportional to 432,428.14, 648,642.21 and 128,826.91 is: 193,240.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,428.14 : 648,642.21 = 128,826.91 : x
  2. Step 2: Convert to fraction form
    432,428.14/648,642.21 = 128,826.91/x
  3. Step 3: Cross multiply
    432,428.14x = 648,642.21 × 128,826.91
  4. Step 4: Simplify right side
    432,428.14x = 83,562,571,609.87
  5. Step 5: Solve for x
    x = 83,562,571,609.87/432,428.14
  6. Step 6: Final answer
    x = 193,240.37

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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.