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Finding the Fourth Proportional to 716.32, 1,075.56 and 625.60

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Solution

The fourth proportional to 716.32, 1,075.56 and 625.60 is: 939.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.32 : 1,075.56 = 625.60 : x
  2. Step 2: Convert to fraction form
    716.32/1,075.56 = 625.60/x
  3. Step 3: Cross multiply
    716.32x = 1,075.56 × 625.60
  4. Step 4: Simplify right side
    716.32x = 672,870.34
  5. Step 5: Solve for x
    x = 672,870.34/716.32
  6. Step 6: Final answer
    x = 939.34

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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.