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Finding the Fourth Proportional to 1,166.88, 1,751.04 and 647.28

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Solution

The fourth proportional to 1,166.88, 1,751.04 and 647.28 is: 971.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,166.88 : 1,751.04 = 647.28 : x
  2. Step 2: Convert to fraction form
    1,166.88/1,751.04 = 647.28/x
  3. Step 3: Cross multiply
    1,166.88x = 1,751.04 × 647.28
  4. Step 4: Simplify right side
    1,166.88x = 1,133,413.17
  5. Step 5: Solve for x
    x = 1,133,413.17/1,166.88
  6. Step 6: Final answer
    x = 971.32

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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.