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Finding the Fourth Proportional to 788.47, 1,182.74 and 211.34

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Solution

The fourth proportional to 788.47, 1,182.74 and 211.34 is: 317.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.47 : 1,182.74 = 211.34 : x
  2. Step 2: Convert to fraction form
    788.47/1,182.74 = 211.34/x
  3. Step 3: Cross multiply
    788.47x = 1,182.74 × 211.34
  4. Step 4: Simplify right side
    788.47x = 249,962.17
  5. Step 5: Solve for x
    x = 249,962.17/788.47
  6. Step 6: Final answer
    x = 317.02

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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.