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Finding the Fourth Proportional to 283,245.76, 390,879.12 and 155,920.42

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Solution

The fourth proportional to 283,245.76, 390,879.12 and 155,920.42 is: 215,170.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,245.76 : 390,879.12 = 155,920.42 : x
  2. Step 2: Convert to fraction form
    283,245.76/390,879.12 = 155,920.42/x
  3. Step 3: Cross multiply
    283,245.76x = 390,879.12 × 155,920.42
  4. Step 4: Simplify right side
    283,245.76x = 60,946,036,559.63
  5. Step 5: Solve for x
    x = 60,946,036,559.63/283,245.76
  6. Step 6: Final answer
    x = 215,170.16

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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.