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Finding the Fourth Proportional to 611,724.40, 844,151.10 and 339,809.80

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Solution

The fourth proportional to 611,724.40, 844,151.10 and 339,809.80 is: 468,921.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,724.40 : 844,151.10 = 339,809.80 : x
  2. Step 2: Convert to fraction form
    611,724.40/844,151.10 = 339,809.80/x
  3. Step 3: Cross multiply
    611,724.40x = 844,151.10 × 339,809.80
  4. Step 4: Simplify right side
    611,724.40x = 286,850,816,460.78
  5. Step 5: Solve for x
    x = 286,850,816,460.78/611,724.40
  6. Step 6: Final answer
    x = 468,921.65

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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.