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Finding the Fourth Proportional to 975.90, 1,346.73 and 556.27

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Solution

The fourth proportional to 975.90, 1,346.73 and 556.27 is: 767.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.90 : 1,346.73 = 556.27 : x
  2. Step 2: Convert to fraction form
    975.90/1,346.73 = 556.27/x
  3. Step 3: Cross multiply
    975.90x = 1,346.73 × 556.27
  4. Step 4: Simplify right side
    975.90x = 749,140.04
  5. Step 5: Solve for x
    x = 749,140.04/975.90
  6. Step 6: Final answer
    x = 767.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.