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Finding the Fourth Proportional to 283,219.49, 390,842.69 and 155,895.08

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Solution

The fourth proportional to 283,219.49, 390,842.69 and 155,895.08 is: 215,135.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,219.49 : 390,842.69 = 155,895.08 : x
  2. Step 2: Convert to fraction form
    283,219.49/390,842.69 = 155,895.08/x
  3. Step 3: Cross multiply
    283,219.49x = 390,842.69 × 155,895.08
  4. Step 4: Simplify right side
    283,219.49x = 60,930,451,889.77
  5. Step 5: Solve for x
    x = 60,930,451,889.77/283,219.49
  6. Step 6: Final answer
    x = 215,135.10

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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.