Home / 426,102.08-638,365.80-215,236.40

Finding the Fourth Proportional to 426,102.08, 638,365.80 and 215,236.40

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Solution

The fourth proportional to 426,102.08, 638,365.80 and 215,236.40 is: 322,456.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,102.08 : 638,365.80 = 215,236.40 : x
  2. Step 2: Convert to fraction form
    426,102.08/638,365.80 = 215,236.40/x
  3. Step 3: Cross multiply
    426,102.08x = 638,365.80 × 215,236.40
  4. Step 4: Simplify right side
    426,102.08x = 137,399,556,675.12
  5. Step 5: Solve for x
    x = 137,399,556,675.12/426,102.08
  6. Step 6: Final answer
    x = 322,456.90

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1.5x scale

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.