Home / 428,031.32-642,074.67-143,710.39

Finding the Fourth Proportional to 428,031.32, 642,074.67 and 143,710.39

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Solution

The fourth proportional to 428,031.32, 642,074.67 and 143,710.39 is: 215,574.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,031.32 : 642,074.67 = 143,710.39 : x
  2. Step 2: Convert to fraction form
    428,031.32/642,074.67 = 143,710.39/x
  3. Step 3: Cross multiply
    428,031.32x = 642,074.67 × 143,710.39
  4. Step 4: Simplify right side
    428,031.32x = 92,272,800,629.26
  5. Step 5: Solve for x
    x = 92,272,800,629.26/428,031.32
  6. Step 6: Final answer
    x = 215,574.88

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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.