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Finding the Fourth Proportional to 390,387.51, 585,667.44 and 165,939.75

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Solution

The fourth proportional to 390,387.51, 585,667.44 and 165,939.75 is: 248,946.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,387.51 : 585,667.44 = 165,939.75 : x
  2. Step 2: Convert to fraction form
    390,387.51/585,667.44 = 165,939.75/x
  3. Step 3: Cross multiply
    390,387.51x = 585,667.44 × 165,939.75
  4. Step 4: Simplify right side
    390,387.51x = 97,185,508,576.74
  5. Step 5: Solve for x
    x = 97,185,508,576.74/390,387.51
  6. Step 6: Final answer
    x = 248,946.25

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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.