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Finding the Fourth Proportional to 391,637, 540,459.60 and 221,882.60

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Solution

The fourth proportional to 391,637, 540,459.60 and 221,882.60 is: 306,198.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,637 : 540,459.60 = 221,882.60 : x
  2. Step 2: Convert to fraction form
    391,637/540,459.60 = 221,882.60/x
  3. Step 3: Cross multiply
    391,637x = 540,459.60 × 221,882.60
  4. Step 4: Simplify right side
    391,637x = 119,918,581,242.96
  5. Step 5: Solve for x
    x = 119,918,581,242.96/391,637
  6. Step 6: Final answer
    x = 306,198.29

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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.