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Finding the Fourth Proportional to 716.15, 1,075.43 and 625.64

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Solution

The fourth proportional to 716.15, 1,075.43 and 625.64 is: 939.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.15 : 1,075.43 = 625.64 : x
  2. Step 2: Convert to fraction form
    716.15/1,075.43 = 625.64/x
  3. Step 3: Cross multiply
    716.15x = 1,075.43 × 625.64
  4. Step 4: Simplify right side
    716.15x = 672,828.21
  5. Step 5: Solve for x
    x = 672,828.21/716.15
  6. Step 6: Final answer
    x = 939.50

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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.