Home / 385,009.20-531,295.20-212,928.75

Finding the Fourth Proportional to 385,009.20, 531,295.20 and 212,928.75

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Solution

The fourth proportional to 385,009.20, 531,295.20 and 212,928.75 is: 293,832.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,009.20 : 531,295.20 = 212,928.75 : x
  2. Step 2: Convert to fraction form
    385,009.20/531,295.20 = 212,928.75/x
  3. Step 3: Cross multiply
    385,009.20x = 531,295.20 × 212,928.75
  4. Step 4: Simplify right side
    385,009.20x = 113,128,022,817.00
  5. Step 5: Solve for x
    x = 113,128,022,817.00/385,009.20
  6. Step 6: Final answer
    x = 293,832.00

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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.