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Finding the Fourth Proportional to 660,042.29, 990,055.08 and 210,757.48

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Solution

The fourth proportional to 660,042.29, 990,055.08 and 210,757.48 is: 316,133.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,042.29 : 990,055.08 = 210,757.48 : x
  2. Step 2: Convert to fraction form
    660,042.29/990,055.08 = 210,757.48/x
  3. Step 3: Cross multiply
    660,042.29x = 990,055.08 × 210,757.48
  4. Step 4: Simplify right side
    660,042.29x = 208,661,511,246.86
  5. Step 5: Solve for x
    x = 208,661,511,246.86/660,042.29
  6. Step 6: Final answer
    x = 316,133.55

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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.