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Finding the Fourth Proportional to 708.65, 977.77 and 522.28

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Solution

The fourth proportional to 708.65, 977.77 and 522.28 is: 720.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.65 : 977.77 = 522.28 : x
  2. Step 2: Convert to fraction form
    708.65/977.77 = 522.28/x
  3. Step 3: Cross multiply
    708.65x = 977.77 × 522.28
  4. Step 4: Simplify right side
    708.65x = 510,669.72
  5. Step 5: Solve for x
    x = 510,669.72/708.65
  6. Step 6: Final answer
    x = 720.62

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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.