Home / 711,040.08-981,232.80-388,749.60

Finding the Fourth Proportional to 711,040.08, 981,232.80 and 388,749.60

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Solution

The fourth proportional to 711,040.08, 981,232.80 and 388,749.60 is: 536,473.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,040.08 : 981,232.80 = 388,749.60 : x
  2. Step 2: Convert to fraction form
    711,040.08/981,232.80 = 388,749.60/x
  3. Step 3: Cross multiply
    711,040.08x = 981,232.80 × 388,749.60
  4. Step 4: Simplify right side
    711,040.08x = 381,453,858,506.88
  5. Step 5: Solve for x
    x = 381,453,858,506.88/711,040.08
  6. Step 6: Final answer
    x = 536,473.08

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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.