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Finding the Fourth Proportional to 717,936.37, 990,752.37 and 391,249.48

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Solution

The fourth proportional to 717,936.37, 990,752.37 and 391,249.48 is: 539,924.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,936.37 : 990,752.37 = 391,249.48 : x
  2. Step 2: Convert to fraction form
    717,936.37/990,752.37 = 391,249.48/x
  3. Step 3: Cross multiply
    717,936.37x = 990,752.37 × 391,249.48
  4. Step 4: Simplify right side
    717,936.37x = 387,631,349,685.64
  5. Step 5: Solve for x
    x = 387,631,349,685.64/717,936.37
  6. Step 6: Final answer
    x = 539,924.38

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Double scale
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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.