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Finding the Fourth Proportional to 1,798.68, 2,699.64 and 977.55

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Solution

The fourth proportional to 1,798.68, 2,699.64 and 977.55 is: 1,467.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,798.68 : 2,699.64 = 977.55 : x
  2. Step 2: Convert to fraction form
    1,798.68/2,699.64 = 977.55/x
  3. Step 3: Cross multiply
    1,798.68x = 2,699.64 × 977.55
  4. Step 4: Simplify right side
    1,798.68x = 2,639,033.08
  5. Step 5: Solve for x
    x = 2,639,033.08/1,798.68
  6. Step 6: Final answer
    x = 1,467.21

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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.