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Finding the Fourth Proportional to 713.25, 1,075.38 and 570.69

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Solution

The fourth proportional to 713.25, 1,075.38 and 570.69 is: 860.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.25 : 1,075.38 = 570.69 : x
  2. Step 2: Convert to fraction form
    713.25/1,075.38 = 570.69/x
  3. Step 3: Cross multiply
    713.25x = 1,075.38 × 570.69
  4. Step 4: Simplify right side
    713.25x = 613,708.61
  5. Step 5: Solve for x
    x = 613,708.61/713.25
  6. Step 6: Final answer
    x = 860.44

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.