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Finding the Fourth Proportional to 280,887.84, 421,332.57 and 81,224.46

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Solution

The fourth proportional to 280,887.84, 421,332.57 and 81,224.46 is: 121,836.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,887.84 : 421,332.57 = 81,224.46 : x
  2. Step 2: Convert to fraction form
    280,887.84/421,332.57 = 81,224.46/x
  3. Step 3: Cross multiply
    280,887.84x = 421,332.57 × 81,224.46
  4. Step 4: Simplify right side
    280,887.84x = 34,222,510,478.66
  5. Step 5: Solve for x
    x = 34,222,510,478.66/280,887.84
  6. Step 6: Final answer
    x = 121,836.92

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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.