Home / 390,529.96-585,126.30-213,161.56

Finding the Fourth Proportional to 390,529.96, 585,126.30 and 213,161.56

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Solution

The fourth proportional to 390,529.96, 585,126.30 and 213,161.56 is: 319,377.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,529.96 : 585,126.30 = 213,161.56 : x
  2. Step 2: Convert to fraction form
    390,529.96/585,126.30 = 213,161.56/x
  3. Step 3: Cross multiply
    390,529.96x = 585,126.30 × 213,161.56
  4. Step 4: Simplify right side
    390,529.96x = 124,726,434,905.03
  5. Step 5: Solve for x
    x = 124,726,434,905.03/390,529.96
  6. Step 6: Final answer
    x = 319,377.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.