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Finding the Fourth Proportional to 660,268.32, 990,444.72 and 186,991.20

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Solution

The fourth proportional to 660,268.32, 990,444.72 and 186,991.20 is: 280,498.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,268.32 : 990,444.72 = 186,991.20 : x
  2. Step 2: Convert to fraction form
    660,268.32/990,444.72 = 186,991.20/x
  3. Step 3: Cross multiply
    660,268.32x = 990,444.72 × 186,991.20
  4. Step 4: Simplify right side
    660,268.32x = 185,204,446,726.46
  5. Step 5: Solve for x
    x = 185,204,446,726.46/660,268.32
  6. Step 6: Final answer
    x = 280,498.76

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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.