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Finding the Fourth Proportional to 378,053.20, 567,079.80 and 339,999.40

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Solution

The fourth proportional to 378,053.20, 567,079.80 and 339,999.40 is: 509,999.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,053.20 : 567,079.80 = 339,999.40 : x
  2. Step 2: Convert to fraction form
    378,053.20/567,079.80 = 339,999.40/x
  3. Step 3: Cross multiply
    378,053.20x = 567,079.80 × 339,999.40
  4. Step 4: Simplify right side
    378,053.20x = 192,806,791,752.12
  5. Step 5: Solve for x
    x = 192,806,791,752.12/378,053.20
  6. Step 6: Final answer
    x = 509,999.10

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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.