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Finding the Fourth Proportional to 1,397,561.76, 1,928,641.68 and 793,982.88

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Solution

The fourth proportional to 1,397,561.76, 1,928,641.68 and 793,982.88 is: 1,095,700.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397,561.76 : 1,928,641.68 = 793,982.88 : x
  2. Step 2: Convert to fraction form
    1,397,561.76/1,928,641.68 = 793,982.88/x
  3. Step 3: Cross multiply
    1,397,561.76x = 1,928,641.68 × 793,982.88
  4. Step 4: Simplify right side
    1,397,561.76x = 1,531,308,475,574.44
  5. Step 5: Solve for x
    x = 1,531,308,475,574.44/1,397,561.76
  6. Step 6: Final answer
    x = 1,095,700.04

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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.