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Finding the Fourth Proportional to 1,658.07, 2,485.55 and 561.66

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Solution

The fourth proportional to 1,658.07, 2,485.55 and 561.66 is: 841.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,658.07 : 2,485.55 = 561.66 : x
  2. Step 2: Convert to fraction form
    1,658.07/2,485.55 = 561.66/x
  3. Step 3: Cross multiply
    1,658.07x = 2,485.55 × 561.66
  4. Step 4: Simplify right side
    1,658.07x = 1,396,034.01
  5. Step 5: Solve for x
    x = 1,396,034.01/1,658.07
  6. Step 6: Final answer
    x = 841.97

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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.