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Finding the Fourth Proportional to 1,435, 1,980.54 and 1,085.08

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Solution

The fourth proportional to 1,435, 1,980.54 and 1,085.08 is: 1,497.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435 : 1,980.54 = 1,085.08 : x
  2. Step 2: Convert to fraction form
    1,435/1,980.54 = 1,085.08/x
  3. Step 3: Cross multiply
    1,435x = 1,980.54 × 1,085.08
  4. Step 4: Simplify right side
    1,435x = 2,149,044.34
  5. Step 5: Solve for x
    x = 2,149,044.34/1,435
  6. Step 6: Final answer
    x = 1,497.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.