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Finding the Fourth Proportional to 807.49, 1,210.49 and 314.23

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Solution

The fourth proportional to 807.49, 1,210.49 and 314.23 is: 471.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.49 : 1,210.49 = 314.23 : x
  2. Step 2: Convert to fraction form
    807.49/1,210.49 = 314.23/x
  3. Step 3: Cross multiply
    807.49x = 1,210.49 × 314.23
  4. Step 4: Simplify right side
    807.49x = 380,372.89
  5. Step 5: Solve for x
    x = 380,372.89/807.49
  6. Step 6: Final answer
    x = 471.06

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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.