Home / 279,318.12-385,455.78-151,991.52

Finding the Fourth Proportional to 279,318.12, 385,455.78 and 151,991.52

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Solution

The fourth proportional to 279,318.12, 385,455.78 and 151,991.52 is: 209,746.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,318.12 : 385,455.78 = 151,991.52 : x
  2. Step 2: Convert to fraction form
    279,318.12/385,455.78 = 151,991.52/x
  3. Step 3: Cross multiply
    279,318.12x = 385,455.78 × 151,991.52
  4. Step 4: Simplify right side
    279,318.12x = 58,586,009,894.99
  5. Step 5: Solve for x
    x = 58,586,009,894.99/279,318.12
  6. Step 6: Final answer
    x = 209,746.54

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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.