Home / 420,071.86-579,733.60-238,840.66

Finding the Fourth Proportional to 420,071.86, 579,733.60 and 238,840.66

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Solution

The fourth proportional to 420,071.86, 579,733.60 and 238,840.66 is: 329,619.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,071.86 : 579,733.60 = 238,840.66 : x
  2. Step 2: Convert to fraction form
    420,071.86/579,733.60 = 238,840.66/x
  3. Step 3: Cross multiply
    420,071.86x = 579,733.60 × 238,840.66
  4. Step 4: Simplify right side
    420,071.86x = 138,463,955,648.18
  5. Step 5: Solve for x
    x = 138,463,955,648.18/420,071.86
  6. Step 6: Final answer
    x = 329,619.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.