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Finding the Fourth Proportional to 327,643.61, 491,465.61 and 90,986.31

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Solution

The fourth proportional to 327,643.61, 491,465.61 and 90,986.31 is: 136,479.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,643.61 : 491,465.61 = 90,986.31 : x
  2. Step 2: Convert to fraction form
    327,643.61/491,465.61 = 90,986.31/x
  3. Step 3: Cross multiply
    327,643.61x = 491,465.61 × 90,986.31
  4. Step 4: Simplify right side
    327,643.61x = 44,716,642,345.80
  5. Step 5: Solve for x
    x = 44,716,642,345.80/327,643.61
  6. Step 6: Final answer
    x = 136,479.52

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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.