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Finding the Fourth Proportional to 881,722.84, 1,216,790.13 and 660,568.28

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Solution

The fourth proportional to 881,722.84, 1,216,790.13 and 660,568.28 is: 911,593.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    881,722.84 : 1,216,790.13 = 660,568.28 : x
  2. Step 2: Convert to fraction form
    881,722.84/1,216,790.13 = 660,568.28/x
  3. Step 3: Cross multiply
    881,722.84x = 1,216,790.13 × 660,568.28
  4. Step 4: Simplify right side
    881,722.84x = 803,772,960,005.97
  5. Step 5: Solve for x
    x = 803,772,960,005.97/881,722.84
  6. Step 6: Final answer
    x = 911,593.67

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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.