Home / 426,104.08-638,368.80-215,238.40

Finding the Fourth Proportional to 426,104.08, 638,368.80 and 215,238.40

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Solution

The fourth proportional to 426,104.08, 638,368.80 and 215,238.40 is: 322,459.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,104.08 : 638,368.80 = 215,238.40 : x
  2. Step 2: Convert to fraction form
    426,104.08/638,368.80 = 215,238.40/x
  3. Step 3: Cross multiply
    426,104.08x = 638,368.80 × 215,238.40
  4. Step 4: Simplify right side
    426,104.08x = 137,401,479,121.92
  5. Step 5: Solve for x
    x = 137,401,479,121.92/426,104.08
  6. Step 6: Final answer
    x = 322,459.90

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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.