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Finding the Fourth Proportional to 557,296.80, 835,945.20 and 389,335.20

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Solution

The fourth proportional to 557,296.80, 835,945.20 and 389,335.20 is: 584,002.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,296.80 : 835,945.20 = 389,335.20 : x
  2. Step 2: Convert to fraction form
    557,296.80/835,945.20 = 389,335.20/x
  3. Step 3: Cross multiply
    557,296.80x = 835,945.20 × 389,335.20
  4. Step 4: Simplify right side
    557,296.80x = 325,462,891,631.04
  5. Step 5: Solve for x
    x = 325,462,891,631.04/557,296.80
  6. Step 6: Final answer
    x = 584,002.80

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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.