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Finding the Fourth Proportional to 1,210.23, 1,813.50 and 479.43

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Solution

The fourth proportional to 1,210.23, 1,813.50 and 479.43 is: 718.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.23 : 1,813.50 = 479.43 : x
  2. Step 2: Convert to fraction form
    1,210.23/1,813.50 = 479.43/x
  3. Step 3: Cross multiply
    1,210.23x = 1,813.50 × 479.43
  4. Step 4: Simplify right side
    1,210.23x = 869,446.31
  5. Step 5: Solve for x
    x = 869,446.31/1,210.23
  6. Step 6: Final answer
    x = 718.41

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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.