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Finding the Fourth Proportional to 714,208.98, 985,605.62 and 391,924.56

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Solution

The fourth proportional to 714,208.98, 985,605.62 and 391,924.56 is: 540,854.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,208.98 : 985,605.62 = 391,924.56 : x
  2. Step 2: Convert to fraction form
    714,208.98/985,605.62 = 391,924.56/x
  3. Step 3: Cross multiply
    714,208.98x = 985,605.62 × 391,924.56
  4. Step 4: Simplify right side
    714,208.98x = 386,283,048,952.03
  5. Step 5: Solve for x
    x = 386,283,048,952.03/714,208.98
  6. Step 6: Final answer
    x = 540,854.37

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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.