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Finding the Fourth Proportional to 522.51, 783.77 and 137.76

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Solution

The fourth proportional to 522.51, 783.77 and 137.76 is: 206.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.51 : 783.77 = 137.76 : x
  2. Step 2: Convert to fraction form
    522.51/783.77 = 137.76/x
  3. Step 3: Cross multiply
    522.51x = 783.77 × 137.76
  4. Step 4: Simplify right side
    522.51x = 107,972.16
  5. Step 5: Solve for x
    x = 107,972.16/522.51
  6. Step 6: Final answer
    x = 206.64

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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.