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Finding the Fourth Proportional to 688.01, 947.49 and 626.49

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Solution

The fourth proportional to 688.01, 947.49 and 626.49 is: 862.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.01 : 947.49 = 626.49 : x
  2. Step 2: Convert to fraction form
    688.01/947.49 = 626.49/x
  3. Step 3: Cross multiply
    688.01x = 947.49 × 626.49
  4. Step 4: Simplify right side
    688.01x = 593,593.01
  5. Step 5: Solve for x
    x = 593,593.01/688.01
  6. Step 6: Final answer
    x = 862.77

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1.5x scale

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.