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Finding the Fourth Proportional to 681,021.58, 939,359.78 and 425,929.90

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Solution

The fourth proportional to 681,021.58, 939,359.78 and 425,929.90 is: 587,501.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,021.58 : 939,359.78 = 425,929.90 : x
  2. Step 2: Convert to fraction form
    681,021.58/939,359.78 = 425,929.90/x
  3. Step 3: Cross multiply
    681,021.58x = 939,359.78 × 425,929.90
  4. Step 4: Simplify right side
    681,021.58x = 400,101,417,159.42
  5. Step 5: Solve for x
    x = 400,101,417,159.42/681,021.58
  6. Step 6: Final answer
    x = 587,501.82

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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.