Home / 426,024.80-638,927.64-126,434.48

Finding the Fourth Proportional to 426,024.80, 638,927.64 and 126,434.48

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Solution

The fourth proportional to 426,024.80, 638,927.64 and 126,434.48 is: 189,619.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,024.80 : 638,927.64 = 126,434.48 : x
  2. Step 2: Convert to fraction form
    426,024.80/638,927.64 = 126,434.48/x
  3. Step 3: Cross multiply
    426,024.80x = 638,927.64 × 126,434.48
  4. Step 4: Simplify right side
    426,024.80x = 80,782,483,921.03
  5. Step 5: Solve for x
    x = 80,782,483,921.03/426,024.80
  6. Step 6: Final answer
    x = 189,619.21

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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.