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Finding the Fourth Proportional to 283,144.98, 390,739.23 and 155,820.48

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Solution

The fourth proportional to 283,144.98, 390,739.23 and 155,820.48 is: 215,031.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,144.98 : 390,739.23 = 155,820.48 : x
  2. Step 2: Convert to fraction form
    283,144.98/390,739.23 = 155,820.48/x
  3. Step 3: Cross multiply
    283,144.98x = 390,739.23 × 155,820.48
  4. Step 4: Simplify right side
    283,144.98x = 60,885,174,373.43
  5. Step 5: Solve for x
    x = 60,885,174,373.43/283,144.98
  6. Step 6: Final answer
    x = 215,031.80

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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.