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Finding the Fourth Proportional to 306,213.66, 459,218.34 and 128,687.58

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Solution

The fourth proportional to 306,213.66, 459,218.34 and 128,687.58 is: 192,988.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,213.66 : 459,218.34 = 128,687.58 : x
  2. Step 2: Convert to fraction form
    306,213.66/459,218.34 = 128,687.58/x
  3. Step 3: Cross multiply
    306,213.66x = 459,218.34 × 128,687.58
  4. Step 4: Simplify right side
    306,213.66x = 59,095,696,866.22
  5. Step 5: Solve for x
    x = 59,095,696,866.22/306,213.66
  6. Step 6: Final answer
    x = 192,988.44

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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.