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Finding the Fourth Proportional to 783.52, 1,081.31 and 452.01

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Solution

The fourth proportional to 783.52, 1,081.31 and 452.01 is: 623.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.52 : 1,081.31 = 452.01 : x
  2. Step 2: Convert to fraction form
    783.52/1,081.31 = 452.01/x
  3. Step 3: Cross multiply
    783.52x = 1,081.31 × 452.01
  4. Step 4: Simplify right side
    783.52x = 488,762.93
  5. Step 5: Solve for x
    x = 488,762.93/783.52
  6. Step 6: Final answer
    x = 623.80

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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.