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Finding the Fourth Proportional to 339,291.92, 508,955.40 and 86,574.62

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Solution

The fourth proportional to 339,291.92, 508,955.40 and 86,574.62 is: 129,866.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,291.92 : 508,955.40 = 86,574.62 : x
  2. Step 2: Convert to fraction form
    339,291.92/508,955.40 = 86,574.62/x
  3. Step 3: Cross multiply
    339,291.92x = 508,955.40 × 86,574.62
  4. Step 4: Simplify right side
    339,291.92x = 44,062,621,624.34
  5. Step 5: Solve for x
    x = 44,062,621,624.34/339,291.92
  6. Step 6: Final answer
    x = 129,866.40

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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.