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Finding the Fourth Proportional to 389,999.08, 584,998.62 and 140,681.08

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Solution

The fourth proportional to 389,999.08, 584,998.62 and 140,681.08 is: 211,021.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,999.08 : 584,998.62 = 140,681.08 : x
  2. Step 2: Convert to fraction form
    389,999.08/584,998.62 = 140,681.08/x
  3. Step 3: Cross multiply
    389,999.08x = 584,998.62 × 140,681.08
  4. Step 4: Simplify right side
    389,999.08x = 82,298,237,660.11
  5. Step 5: Solve for x
    x = 82,298,237,660.11/389,999.08
  6. Step 6: Final answer
    x = 211,021.62

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Similar ratio
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1.5x scale

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.