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Finding the Fourth Proportional to 1,307.15, 1,960.59 and 537.65

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Solution

The fourth proportional to 1,307.15, 1,960.59 and 537.65 is: 806.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.15 : 1,960.59 = 537.65 : x
  2. Step 2: Convert to fraction form
    1,307.15/1,960.59 = 537.65/x
  3. Step 3: Cross multiply
    1,307.15x = 1,960.59 × 537.65
  4. Step 4: Simplify right side
    1,307.15x = 1,054,111.21
  5. Step 5: Solve for x
    x = 1,054,111.21/1,307.15
  6. Step 6: Final answer
    x = 806.42

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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.