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Finding the Fourth Proportional to 283,254.90, 390,902.91 and 155,942.34

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Solution

The fourth proportional to 283,254.90, 390,902.91 and 155,942.34 is: 215,206.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,254.90 : 390,902.91 = 155,942.34 : x
  2. Step 2: Convert to fraction form
    283,254.90/390,902.91 = 155,942.34/x
  3. Step 3: Cross multiply
    283,254.90x = 390,902.91 × 155,942.34
  4. Step 4: Simplify right side
    283,254.90x = 60,958,314,498.21
  5. Step 5: Solve for x
    x = 60,958,314,498.21/283,254.90
  6. Step 6: Final answer
    x = 215,206.57

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1.5x scale

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.