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Finding the Fourth Proportional to 391,767.36, 539,838 and 370,593.60

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Solution

The fourth proportional to 391,767.36, 539,838 and 370,593.60 is: 510,661.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,767.36 : 539,838 = 370,593.60 : x
  2. Step 2: Convert to fraction form
    391,767.36/539,838 = 370,593.60/x
  3. Step 3: Cross multiply
    391,767.36x = 539,838 × 370,593.60
  4. Step 4: Simplify right side
    391,767.36x = 200,060,507,836.80
  5. Step 5: Solve for x
    x = 200,060,507,836.80/391,767.36
  6. Step 6: Final answer
    x = 510,661.50

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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.