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Finding the Fourth Proportional to 1,207.51, 1,811.99 and 630.55

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Solution

The fourth proportional to 1,207.51, 1,811.99 and 630.55 is: 946.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.51 : 1,811.99 = 630.55 : x
  2. Step 2: Convert to fraction form
    1,207.51/1,811.99 = 630.55/x
  3. Step 3: Cross multiply
    1,207.51x = 1,811.99 × 630.55
  4. Step 4: Simplify right side
    1,207.51x = 1,142,550.29
  5. Step 5: Solve for x
    x = 1,142,550.29/1,207.51
  6. Step 6: Final answer
    x = 946.20

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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.