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Finding the Fourth Proportional to 1,666.66, 2,500.13 and 612.76

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Solution

The fourth proportional to 1,666.66, 2,500.13 and 612.76 is: 919.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,666.66 : 2,500.13 = 612.76 : x
  2. Step 2: Convert to fraction form
    1,666.66/2,500.13 = 612.76/x
  3. Step 3: Cross multiply
    1,666.66x = 2,500.13 × 612.76
  4. Step 4: Simplify right side
    1,666.66x = 1,531,979.66
  5. Step 5: Solve for x
    x = 1,531,979.66/1,666.66
  6. Step 6: Final answer
    x = 919.19

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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.