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Finding the Fourth Proportional to 1,664.79, 2,497.32 and 478.83

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Solution

The fourth proportional to 1,664.79, 2,497.32 and 478.83 is: 718.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,664.79 : 2,497.32 = 478.83 : x
  2. Step 2: Convert to fraction form
    1,664.79/2,497.32 = 478.83/x
  3. Step 3: Cross multiply
    1,664.79x = 2,497.32 × 478.83
  4. Step 4: Simplify right side
    1,664.79x = 1,195,776.85
  5. Step 5: Solve for x
    x = 1,195,776.85/1,664.79
  6. Step 6: Final answer
    x = 718.28

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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.