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Finding the Fourth Proportional to 1,666.76, 2,499.92 and 1,048.64

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Solution

The fourth proportional to 1,666.76, 2,499.92 and 1,048.64 is: 1,572.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,666.76 : 2,499.92 = 1,048.64 : x
  2. Step 2: Convert to fraction form
    1,666.76/2,499.92 = 1,048.64/x
  3. Step 3: Cross multiply
    1,666.76x = 2,499.92 × 1,048.64
  4. Step 4: Simplify right side
    1,666.76x = 2,621,516.11
  5. Step 5: Solve for x
    x = 2,621,516.11/1,666.76
  6. Step 6: Final answer
    x = 1,572.82

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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.