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Finding the Fourth Proportional to 1,653.24, 2,479.44 and 612.66

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Solution

The fourth proportional to 1,653.24, 2,479.44 and 612.66 is: 918.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,653.24 : 2,479.44 = 612.66 : x
  2. Step 2: Convert to fraction form
    1,653.24/2,479.44 = 612.66/x
  3. Step 3: Cross multiply
    1,653.24x = 2,479.44 × 612.66
  4. Step 4: Simplify right side
    1,653.24x = 1,519,060.14
  5. Step 5: Solve for x
    x = 1,519,060.14/1,653.24
  6. Step 6: Final answer
    x = 918.84

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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.