Home / 426,087.03-638,521.34-312,879.09

Finding the Fourth Proportional to 426,087.03, 638,521.34 and 312,879.09

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Solution

The fourth proportional to 426,087.03, 638,521.34 and 312,879.09 is: 468,871.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,087.03 : 638,521.34 = 312,879.09 : x
  2. Step 2: Convert to fraction form
    426,087.03/638,521.34 = 312,879.09/x
  3. Step 3: Cross multiply
    426,087.03x = 638,521.34 × 312,879.09
  4. Step 4: Simplify right side
    426,087.03x = 199,779,974,240.39
  5. Step 5: Solve for x
    x = 199,779,974,240.39/426,087.03
  6. Step 6: Final answer
    x = 468,871.29

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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.