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Finding the Fourth Proportional to 485,708.32, 728,646.72 and 148,741.03

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Solution

The fourth proportional to 485,708.32, 728,646.72 and 148,741.03 is: 223,137.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,708.32 : 728,646.72 = 148,741.03 : x
  2. Step 2: Convert to fraction form
    485,708.32/728,646.72 = 148,741.03/x
  3. Step 3: Cross multiply
    485,708.32x = 728,646.72 × 148,741.03
  4. Step 4: Simplify right side
    485,708.32x = 108,379,663,638.92
  5. Step 5: Solve for x
    x = 108,379,663,638.92/485,708.32
  6. Step 6: Final answer
    x = 223,137.34

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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.