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Finding the Fourth Proportional to 660,485.97, 990,416.67 and 255,867.69

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Solution

The fourth proportional to 660,485.97, 990,416.67 and 255,867.69 is: 383,680.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,485.97 : 990,416.67 = 255,867.69 : x
  2. Step 2: Convert to fraction form
    660,485.97/990,416.67 = 255,867.69/x
  3. Step 3: Cross multiply
    660,485.97x = 990,416.67 × 255,867.69
  4. Step 4: Simplify right side
    660,485.97x = 253,415,625,490.39
  5. Step 5: Solve for x
    x = 253,415,625,490.39/660,485.97
  6. Step 6: Final answer
    x = 383,680.56

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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.