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Finding the Fourth Proportional to 1,606.65, 2,410.65 and 785.72

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Solution

The fourth proportional to 1,606.65, 2,410.65 and 785.72 is: 1,178.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,606.65 : 2,410.65 = 785.72 : x
  2. Step 2: Convert to fraction form
    1,606.65/2,410.65 = 785.72/x
  3. Step 3: Cross multiply
    1,606.65x = 2,410.65 × 785.72
  4. Step 4: Simplify right side
    1,606.65x = 1,894,083.86
  5. Step 5: Solve for x
    x = 1,894,083.86/1,606.65
  6. Step 6: Final answer
    x = 1,178.90

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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.