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Finding the Fourth Proportional to 380,894.12, 525,665.06 and 211,183.08

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Solution

The fourth proportional to 380,894.12, 525,665.06 and 211,183.08 is: 291,449.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,894.12 : 525,665.06 = 211,183.08 : x
  2. Step 2: Convert to fraction form
    380,894.12/525,665.06 = 211,183.08/x
  3. Step 3: Cross multiply
    380,894.12x = 525,665.06 × 211,183.08
  4. Step 4: Simplify right side
    380,894.12x = 111,011,566,419.19
  5. Step 5: Solve for x
    x = 111,011,566,419.19/380,894.12
  6. Step 6: Final answer
    x = 291,449.93

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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.