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Finding the Fourth Proportional to 391,501.02, 540,271.19 and 221,735.15

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Solution

The fourth proportional to 391,501.02, 540,271.19 and 221,735.15 is: 305,994.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,501.02 : 540,271.19 = 221,735.15 : x
  2. Step 2: Convert to fraction form
    391,501.02/540,271.19 = 221,735.15/x
  3. Step 3: Cross multiply
    391,501.02x = 540,271.19 × 221,735.15
  4. Step 4: Simplify right side
    391,501.02x = 119,797,113,355.33
  5. Step 5: Solve for x
    x = 119,797,113,355.33/391,501.02
  6. Step 6: Final answer
    x = 305,994.38

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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.