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Finding the Fourth Proportional to 681,239.48, 940,014.06 and 386,879

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Solution

The fourth proportional to 681,239.48, 940,014.06 and 386,879 is: 533,838.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,239.48 : 940,014.06 = 386,879 : x
  2. Step 2: Convert to fraction form
    681,239.48/940,014.06 = 386,879/x
  3. Step 3: Cross multiply
    681,239.48x = 940,014.06 × 386,879
  4. Step 4: Simplify right side
    681,239.48x = 363,671,699,518.74
  5. Step 5: Solve for x
    x = 363,671,699,518.74/681,239.48
  6. Step 6: Final answer
    x = 533,838.26

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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.