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Finding the Fourth Proportional to 259,433.76, 389,116.08 and 72,464.16

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Solution

The fourth proportional to 259,433.76, 389,116.08 and 72,464.16 is: 108,686.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,433.76 : 389,116.08 = 72,464.16 : x
  2. Step 2: Convert to fraction form
    259,433.76/389,116.08 = 72,464.16/x
  3. Step 3: Cross multiply
    259,433.76x = 389,116.08 × 72,464.16
  4. Step 4: Simplify right side
    259,433.76x = 28,196,969,879.69
  5. Step 5: Solve for x
    x = 28,196,969,879.69/259,433.76
  6. Step 6: Final answer
    x = 108,686.59

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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.