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Finding the Fourth Proportional to 403,290.32, 604,990.84 and 136,979.34

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Solution

The fourth proportional to 403,290.32, 604,990.84 and 136,979.34 is: 205,487.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,290.32 : 604,990.84 = 136,979.34 : x
  2. Step 2: Convert to fraction form
    403,290.32/604,990.84 = 136,979.34/x
  3. Step 3: Cross multiply
    403,290.32x = 604,990.84 × 136,979.34
  4. Step 4: Simplify right side
    403,290.32x = 82,871,245,969.25
  5. Step 5: Solve for x
    x = 82,871,245,969.25/403,290.32
  6. Step 6: Final answer
    x = 205,487.81

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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.