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Finding the Fourth Proportional to 975.76, 1,345.96 and 626.32

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Solution

The fourth proportional to 975.76, 1,345.96 and 626.32 is: 863.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.76 : 1,345.96 = 626.32 : x
  2. Step 2: Convert to fraction form
    975.76/1,345.96 = 626.32/x
  3. Step 3: Cross multiply
    975.76x = 1,345.96 × 626.32
  4. Step 4: Simplify right side
    975.76x = 843,001.67
  5. Step 5: Solve for x
    x = 843,001.67/975.76
  6. Step 6: Final answer
    x = 863.94

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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.