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Finding the Fourth Proportional to 485,433.32, 728,149.35 and 130,447.34

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Solution

The fourth proportional to 485,433.32, 728,149.35 and 130,447.34 is: 195,670.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,433.32 : 728,149.35 = 130,447.34 : x
  2. Step 2: Convert to fraction form
    485,433.32/728,149.35 = 130,447.34/x
  3. Step 3: Cross multiply
    485,433.32x = 728,149.35 × 130,447.34
  4. Step 4: Simplify right side
    485,433.32x = 94,985,148,139.78
  5. Step 5: Solve for x
    x = 94,985,148,139.78/485,433.32
  6. Step 6: Final answer
    x = 195,670.84

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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.