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Finding the Fourth Proportional to 285,259.11, 427,959.74 and 85,583.17

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Solution

The fourth proportional to 285,259.11, 427,959.74 and 85,583.17 is: 128,396.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,259.11 : 427,959.74 = 85,583.17 : x
  2. Step 2: Convert to fraction form
    285,259.11/427,959.74 = 85,583.17/x
  3. Step 3: Cross multiply
    285,259.11x = 427,959.74 × 85,583.17
  4. Step 4: Simplify right side
    285,259.11x = 36,626,150,753.66
  5. Step 5: Solve for x
    x = 36,626,150,753.66/285,259.11
  6. Step 6: Final answer
    x = 128,396.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.