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Finding the Fourth Proportional to 486,158.40, 729,203.04 and 131,192.64

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Solution

The fourth proportional to 486,158.40, 729,203.04 and 131,192.64 is: 196,779.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,158.40 : 729,203.04 = 131,192.64 : x
  2. Step 2: Convert to fraction form
    486,158.40/729,203.04 = 131,192.64/x
  3. Step 3: Cross multiply
    486,158.40x = 729,203.04 × 131,192.64
  4. Step 4: Simplify right side
    486,158.40x = 95,666,071,913.63
  5. Step 5: Solve for x
    x = 95,666,071,913.63/486,158.40
  6. Step 6: Final answer
    x = 196,779.63

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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.