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Finding the Fourth Proportional to 643,703.20, 965,727.60 and 574,064.80

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Solution

The fourth proportional to 643,703.20, 965,727.60 and 574,064.80 is: 861,251.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,703.20 : 965,727.60 = 574,064.80 : x
  2. Step 2: Convert to fraction form
    643,703.20/965,727.60 = 574,064.80/x
  3. Step 3: Cross multiply
    643,703.20x = 965,727.60 × 574,064.80
  4. Step 4: Simplify right side
    643,703.20x = 554,390,221,548.48
  5. Step 5: Solve for x
    x = 554,390,221,548.48/643,703.20
  6. Step 6: Final answer
    x = 861,251.31

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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.