Home / 390,287.90-585,962.96-219,630.18

Finding the Fourth Proportional to 390,287.90, 585,962.96 and 219,630.18

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Solution

The fourth proportional to 390,287.90, 585,962.96 and 219,630.18 is: 329,744.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,287.90 : 585,962.96 = 219,630.18 : x
  2. Step 2: Convert to fraction form
    390,287.90/585,962.96 = 219,630.18/x
  3. Step 3: Cross multiply
    390,287.90x = 585,962.96 × 219,630.18
  4. Step 4: Simplify right side
    390,287.90x = 128,695,150,927.21
  5. Step 5: Solve for x
    x = 128,695,150,927.21/390,287.90
  6. Step 6: Final answer
    x = 329,744.15

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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.