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Finding the Fourth Proportional to 717.39, 1,075.91 and 370.31

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Solution

The fourth proportional to 717.39, 1,075.91 and 370.31 is: 555.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.39 : 1,075.91 = 370.31 : x
  2. Step 2: Convert to fraction form
    717.39/1,075.91 = 370.31/x
  3. Step 3: Cross multiply
    717.39x = 1,075.91 × 370.31
  4. Step 4: Simplify right side
    717.39x = 398,413.00
  5. Step 5: Solve for x
    x = 398,413.00/717.39
  6. Step 6: Final answer
    x = 555.36

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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.