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Finding the Fourth Proportional to 1,661.11, 2,490.04 and 929.07

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Solution

The fourth proportional to 1,661.11, 2,490.04 and 929.07 is: 1,392.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,661.11 : 2,490.04 = 929.07 : x
  2. Step 2: Convert to fraction form
    1,661.11/2,490.04 = 929.07/x
  3. Step 3: Cross multiply
    1,661.11x = 2,490.04 × 929.07
  4. Step 4: Simplify right side
    1,661.11x = 2,313,421.46
  5. Step 5: Solve for x
    x = 2,313,421.46/1,661.11
  6. Step 6: Final answer
    x = 1,392.70

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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.