Home / 390,619.19-585,780.09-137,852.58

Finding the Fourth Proportional to 390,619.19, 585,780.09 and 137,852.58

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Solution

The fourth proportional to 390,619.19, 585,780.09 and 137,852.58 is: 206,726.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,619.19 : 585,780.09 = 137,852.58 : x
  2. Step 2: Convert to fraction form
    390,619.19/585,780.09 = 137,852.58/x
  3. Step 3: Cross multiply
    390,619.19x = 585,780.09 × 137,852.58
  4. Step 4: Simplify right side
    390,619.19x = 80,751,298,398.86
  5. Step 5: Solve for x
    x = 80,751,298,398.86/390,619.19
  6. Step 6: Final answer
    x = 206,726.40

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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.