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Finding the Fourth Proportional to 390,357.12, 585,083.52 and 179,552.64

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Solution

The fourth proportional to 390,357.12, 585,083.52 and 179,552.64 is: 269,120.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,357.12 : 585,083.52 = 179,552.64 : x
  2. Step 2: Convert to fraction form
    390,357.12/585,083.52 = 179,552.64/x
  3. Step 3: Cross multiply
    390,357.12x = 585,083.52 × 179,552.64
  4. Step 4: Simplify right side
    390,357.12x = 105,053,290,636.49
  5. Step 5: Solve for x
    x = 105,053,290,636.49/390,357.12
  6. Step 6: Final answer
    x = 269,120.98

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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.