Home / 1,666.55-2,299.85-1,225.28

Finding the Fourth Proportional to 1,666.55, 2,299.85 and 1,225.28

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Solution

The fourth proportional to 1,666.55, 2,299.85 and 1,225.28 is: 1,690.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,666.55 : 2,299.85 = 1,225.28 : x
  2. Step 2: Convert to fraction form
    1,666.55/2,299.85 = 1,225.28/x
  3. Step 3: Cross multiply
    1,666.55x = 2,299.85 × 1,225.28
  4. Step 4: Simplify right side
    1,666.55x = 2,817,942.58
  5. Step 5: Solve for x
    x = 2,817,942.58/1,666.55
  6. Step 6: Final answer
    x = 1,690.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.