Home / 426,125.12-638,578.69-312,917.22

Finding the Fourth Proportional to 426,125.12, 638,578.69 and 312,917.22

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Solution

The fourth proportional to 426,125.12, 638,578.69 and 312,917.22 is: 468,928.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,125.12 : 638,578.69 = 312,917.22 : x
  2. Step 2: Convert to fraction form
    426,125.12/638,578.69 = 312,917.22/x
  3. Step 3: Cross multiply
    426,125.12x = 638,578.69 × 312,917.22
  4. Step 4: Simplify right side
    426,125.12x = 199,822,267,643.75
  5. Step 5: Solve for x
    x = 199,822,267,643.75/426,125.12
  6. Step 6: Final answer
    x = 468,928.63

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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.