Home / 428,626.10-642,122.58-266,263.22

Finding the Fourth Proportional to 428,626.10, 642,122.58 and 266,263.22

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Solution

The fourth proportional to 428,626.10, 642,122.58 and 266,263.22 is: 398,887.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,626.10 : 642,122.58 = 266,263.22 : x
  2. Step 2: Convert to fraction form
    428,626.10/642,122.58 = 266,263.22/x
  3. Step 3: Cross multiply
    428,626.10x = 642,122.58 × 266,263.22
  4. Step 4: Simplify right side
    428,626.10x = 170,973,625,785.51
  5. Step 5: Solve for x
    x = 170,973,625,785.51/428,626.10
  6. Step 6: Final answer
    x = 398,887.58

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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.