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Finding the Fourth Proportional to 1,107,680.70, 1,528,978.86 and 648,942.78

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Solution

The fourth proportional to 1,107,680.70, 1,528,978.86 and 648,942.78 is: 895,763.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107,680.70 : 1,528,978.86 = 648,942.78 : x
  2. Step 2: Convert to fraction form
    1,107,680.70/1,528,978.86 = 648,942.78/x
  3. Step 3: Cross multiply
    1,107,680.70x = 1,528,978.86 × 648,942.78
  4. Step 4: Simplify right side
    1,107,680.70x = 992,219,791,969.63
  5. Step 5: Solve for x
    x = 992,219,791,969.63/1,107,680.70
  6. Step 6: Final answer
    x = 895,763.37

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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.