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Finding the Fourth Proportional to 1,295,354.42, 1,786,979.01 and 842,480.18

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Solution

The fourth proportional to 1,295,354.42, 1,786,979.01 and 842,480.18 is: 1,162,225.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295,354.42 : 1,786,979.01 = 842,480.18 : x
  2. Step 2: Convert to fraction form
    1,295,354.42/1,786,979.01 = 842,480.18/x
  3. Step 3: Cross multiply
    1,295,354.42x = 1,786,979.01 × 842,480.18
  4. Step 4: Simplify right side
    1,295,354.42x = 1,505,494,398,001.02
  5. Step 5: Solve for x
    x = 1,505,494,398,001.02/1,295,354.42
  6. Step 6: Final answer
    x = 1,162,225.85

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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.