Home / 861,664.80-1,293,080.40-388,106.40

Finding the Fourth Proportional to 861,664.80, 1,293,080.40 and 388,106.40

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Solution

The fourth proportional to 861,664.80, 1,293,080.40 and 388,106.40 is: 582,422.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,664.80 : 1,293,080.40 = 388,106.40 : x
  2. Step 2: Convert to fraction form
    861,664.80/1,293,080.40 = 388,106.40/x
  3. Step 3: Cross multiply
    861,664.80x = 1,293,080.40 × 388,106.40
  4. Step 4: Simplify right side
    861,664.80x = 501,852,778,954.56
  5. Step 5: Solve for x
    x = 501,852,778,954.56/861,664.80
  6. Step 6: Final answer
    x = 582,422.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.