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Finding the Fourth Proportional to 1,668.46, 2,502.40 and 557.77

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Solution

The fourth proportional to 1,668.46, 2,502.40 and 557.77 is: 836.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,668.46 : 2,502.40 = 557.77 : x
  2. Step 2: Convert to fraction form
    1,668.46/2,502.40 = 557.77/x
  3. Step 3: Cross multiply
    1,668.46x = 2,502.40 × 557.77
  4. Step 4: Simplify right side
    1,668.46x = 1,395,762.25
  5. Step 5: Solve for x
    x = 1,395,762.25/1,668.46
  6. Step 6: Final answer
    x = 836.56

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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.