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Finding the Fourth Proportional to 313,472.39, 432,724.32 and 211,635.80

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Solution

The fourth proportional to 313,472.39, 432,724.32 and 211,635.80 is: 292,146.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,472.39 : 432,724.32 = 211,635.80 : x
  2. Step 2: Convert to fraction form
    313,472.39/432,724.32 = 211,635.80/x
  3. Step 3: Cross multiply
    313,472.39x = 432,724.32 × 211,635.80
  4. Step 4: Simplify right side
    313,472.39x = 91,579,955,479.03
  5. Step 5: Solve for x
    x = 91,579,955,479.03/313,472.39
  6. Step 6: Final answer
    x = 292,146.80

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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.