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Finding the Fourth Proportional to 306,613.63, 459,885.40 and 81,991.58

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Solution

The fourth proportional to 306,613.63, 459,885.40 and 81,991.58 is: 122,977.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,613.63 : 459,885.40 = 81,991.58 : x
  2. Step 2: Convert to fraction form
    306,613.63/459,885.40 = 81,991.58/x
  3. Step 3: Cross multiply
    306,613.63x = 459,885.40 × 81,991.58
  4. Step 4: Simplify right side
    306,613.63x = 37,706,728,265.51
  5. Step 5: Solve for x
    x = 37,706,728,265.51/306,613.63
  6. Step 6: Final answer
    x = 122,977.99

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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.