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Finding the Fourth Proportional to 306,615.79, 459,888.64 and 81,993.74

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Solution

The fourth proportional to 306,615.79, 459,888.64 and 81,993.74 is: 122,981.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,615.79 : 459,888.64 = 81,993.74 : x
  2. Step 2: Convert to fraction form
    306,615.79/459,888.64 = 81,993.74/x
  3. Step 3: Cross multiply
    306,615.79x = 459,888.64 × 81,993.74
  4. Step 4: Simplify right side
    306,615.79x = 37,707,987,072.69
  5. Step 5: Solve for x
    x = 37,707,987,072.69/306,615.79
  6. Step 6: Final answer
    x = 122,981.23

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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.