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Finding the Fourth Proportional to 626.64, 866.70 and 561.12

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Solution

The fourth proportional to 626.64, 866.70 and 561.12 is: 776.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.64 : 866.70 = 561.12 : x
  2. Step 2: Convert to fraction form
    626.64/866.70 = 561.12/x
  3. Step 3: Cross multiply
    626.64x = 866.70 × 561.12
  4. Step 4: Simplify right side
    626.64x = 486,322.70
  5. Step 5: Solve for x
    x = 486,322.70/626.64
  6. Step 6: Final answer
    x = 776.08

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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.