Home / 283,128.22-390,707.15-155,791.90

Finding the Fourth Proportional to 283,128.22, 390,707.15 and 155,791.90

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Solution

The fourth proportional to 283,128.22, 390,707.15 and 155,791.90 is: 214,987.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,128.22 : 390,707.15 = 155,791.90 : x
  2. Step 2: Convert to fraction form
    283,128.22/390,707.15 = 155,791.90/x
  3. Step 3: Cross multiply
    283,128.22x = 390,707.15 × 155,791.90
  4. Step 4: Simplify right side
    283,128.22x = 60,869,009,242.09
  5. Step 5: Solve for x
    x = 60,869,009,242.09/283,128.22
  6. Step 6: Final answer
    x = 214,987.43

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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.