Home / 711,138.02-981,290.09-420,758.48

Finding the Fourth Proportional to 711,138.02, 981,290.09 and 420,758.48

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Solution

The fourth proportional to 711,138.02, 981,290.09 and 420,758.48 is: 580,599.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,138.02 : 981,290.09 = 420,758.48 : x
  2. Step 2: Convert to fraction form
    711,138.02/981,290.09 = 420,758.48/x
  3. Step 3: Cross multiply
    711,138.02x = 981,290.09 × 420,758.48
  4. Step 4: Simplify right side
    711,138.02x = 412,886,130,212.59
  5. Step 5: Solve for x
    x = 412,886,130,212.59/711,138.02
  6. Step 6: Final answer
    x = 580,599.15

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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.