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Finding the Fourth Proportional to 881,781, 1,216,866.42 and 479,381.64

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Solution

The fourth proportional to 881,781, 1,216,866.42 and 479,381.64 is: 661,551.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    881,781 : 1,216,866.42 = 479,381.64 : x
  2. Step 2: Convert to fraction form
    881,781/1,216,866.42 = 479,381.64/x
  3. Step 3: Cross multiply
    881,781x = 1,216,866.42 × 479,381.64
  4. Step 4: Simplify right side
    881,781x = 583,343,420,080.53
  5. Step 5: Solve for x
    x = 583,343,420,080.53/881,781
  6. Step 6: Final answer
    x = 661,551.36

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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.