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Finding the Fourth Proportional to 783.74, 1,081.55 and 434.43

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Solution

The fourth proportional to 783.74, 1,081.55 and 434.43 is: 599.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.74 : 1,081.55 = 434.43 : x
  2. Step 2: Convert to fraction form
    783.74/1,081.55 = 434.43/x
  3. Step 3: Cross multiply
    783.74x = 1,081.55 × 434.43
  4. Step 4: Simplify right side
    783.74x = 469,855.59
  5. Step 5: Solve for x
    x = 469,855.59/783.74
  6. Step 6: Final answer
    x = 599.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.