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Finding the Fourth Proportional to 666,677.76, 919,992.96 and 380,290.56

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Solution

The fourth proportional to 666,677.76, 919,992.96 and 380,290.56 is: 524,788.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,677.76 : 919,992.96 = 380,290.56 : x
  2. Step 2: Convert to fraction form
    666,677.76/919,992.96 = 380,290.56/x
  3. Step 3: Cross multiply
    666,677.76x = 919,992.96 × 380,290.56
  4. Step 4: Simplify right side
    666,677.76x = 349,864,637,954.46
  5. Step 5: Solve for x
    x = 349,864,637,954.46/666,677.76
  6. Step 6: Final answer
    x = 524,788.22

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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.