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Finding the Fourth Proportional to 1,321,740.64, 1,823,942.64 and 748,769.12

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Solution

The fourth proportional to 1,321,740.64, 1,823,942.64 and 748,769.12 is: 1,033,267.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,740.64 : 1,823,942.64 = 748,769.12 : x
  2. Step 2: Convert to fraction form
    1,321,740.64/1,823,942.64 = 748,769.12/x
  3. Step 3: Cross multiply
    1,321,740.64x = 1,823,942.64 × 748,769.12
  4. Step 4: Simplify right side
    1,321,740.64x = 1,365,711,925,483.28
  5. Step 5: Solve for x
    x = 1,365,711,925,483.28/1,321,740.64
  6. Step 6: Final answer
    x = 1,033,267.71

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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.