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Finding the Fourth Proportional to 538,903.80, 808,355.70 and 339,449.40

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Solution

The fourth proportional to 538,903.80, 808,355.70 and 339,449.40 is: 509,174.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,903.80 : 808,355.70 = 339,449.40 : x
  2. Step 2: Convert to fraction form
    538,903.80/808,355.70 = 339,449.40/x
  3. Step 3: Cross multiply
    538,903.80x = 808,355.70 × 339,449.40
  4. Step 4: Simplify right side
    538,903.80x = 274,395,857,351.58
  5. Step 5: Solve for x
    x = 274,395,857,351.58/538,903.80
  6. Step 6: Final answer
    x = 509,174.10

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Similar ratio
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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.