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Finding the Fourth Proportional to 1,665.36, 2,498.40 and 625.68

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Solution

The fourth proportional to 1,665.36, 2,498.40 and 625.68 is: 938.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,665.36 : 2,498.40 = 625.68 : x
  2. Step 2: Convert to fraction form
    1,665.36/2,498.40 = 625.68/x
  3. Step 3: Cross multiply
    1,665.36x = 2,498.40 × 625.68
  4. Step 4: Simplify right side
    1,665.36x = 1,563,198.91
  5. Step 5: Solve for x
    x = 1,563,198.91/1,665.36
  6. Step 6: Final answer
    x = 938.66

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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.