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Finding the Fourth Proportional to 975.76, 1,346.16 and 626.44

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Solution

The fourth proportional to 975.76, 1,346.16 and 626.44 is: 864.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.76 : 1,346.16 = 626.44 : x
  2. Step 2: Convert to fraction form
    975.76/1,346.16 = 626.44/x
  3. Step 3: Cross multiply
    975.76x = 1,346.16 × 626.44
  4. Step 4: Simplify right side
    975.76x = 843,288.47
  5. Step 5: Solve for x
    x = 843,288.47/975.76
  6. Step 6: Final answer
    x = 864.24

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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.