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Finding the Fourth Proportional to 390,010.80, 585,072.90 and 165,370.80

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Solution

The fourth proportional to 390,010.80, 585,072.90 and 165,370.80 is: 248,080.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,010.80 : 585,072.90 = 165,370.80 : x
  2. Step 2: Convert to fraction form
    390,010.80/585,072.90 = 165,370.80/x
  3. Step 3: Cross multiply
    390,010.80x = 585,072.90 × 165,370.80
  4. Step 4: Simplify right side
    390,010.80x = 96,753,973,531.32
  5. Step 5: Solve for x
    x = 96,753,973,531.32/390,010.80
  6. Step 6: Final answer
    x = 248,080.24

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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.