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Finding the Fourth Proportional to 688.77, 949.73 and 501.93

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Solution

The fourth proportional to 688.77, 949.73 and 501.93 is: 692.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.77 : 949.73 = 501.93 : x
  2. Step 2: Convert to fraction form
    688.77/949.73 = 501.93/x
  3. Step 3: Cross multiply
    688.77x = 949.73 × 501.93
  4. Step 4: Simplify right side
    688.77x = 476,695.47
  5. Step 5: Solve for x
    x = 476,695.47/688.77
  6. Step 6: Final answer
    x = 692.10

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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.