Home / 711,508.56-981,881.48-389,218.58

Finding the Fourth Proportional to 711,508.56, 981,881.48 and 389,218.58

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Solution

The fourth proportional to 711,508.56, 981,881.48 and 389,218.58 is: 537,121.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,508.56 : 981,881.48 = 389,218.58 : x
  2. Step 2: Convert to fraction form
    711,508.56/981,881.48 = 389,218.58/x
  3. Step 3: Cross multiply
    711,508.56x = 981,881.48 × 389,218.58
  4. Step 4: Simplify right side
    711,508.56x = 382,166,515,373.90
  5. Step 5: Solve for x
    x = 382,166,515,373.90/711,508.56
  6. Step 6: Final answer
    x = 537,121.46

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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.