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Finding the Fourth Proportional to 687.69, 1,030.52 and 341.01

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Solution

The fourth proportional to 687.69, 1,030.52 and 341.01 is: 511.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.69 : 1,030.52 = 341.01 : x
  2. Step 2: Convert to fraction form
    687.69/1,030.52 = 341.01/x
  3. Step 3: Cross multiply
    687.69x = 1,030.52 × 341.01
  4. Step 4: Simplify right side
    687.69x = 351,418.48
  5. Step 5: Solve for x
    x = 351,418.48/687.69
  6. Step 6: Final answer
    x = 511.01

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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.