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Finding the Fourth Proportional to 1,698.99, 2,547.25 and 658.09

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Solution

The fourth proportional to 1,698.99, 2,547.25 and 658.09 is: 986.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,698.99 : 2,547.25 = 658.09 : x
  2. Step 2: Convert to fraction form
    1,698.99/2,547.25 = 658.09/x
  3. Step 3: Cross multiply
    1,698.99x = 2,547.25 × 658.09
  4. Step 4: Simplify right side
    1,698.99x = 1,676,319.75
  5. Step 5: Solve for x
    x = 1,676,319.75/1,698.99
  6. Step 6: Final answer
    x = 986.66

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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.