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Finding the Fourth Proportional to 975.96, 1,345.32 and 955.20

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Solution

The fourth proportional to 975.96, 1,345.32 and 955.20 is: 1,316.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.96 : 1,345.32 = 955.20 : x
  2. Step 2: Convert to fraction form
    975.96/1,345.32 = 955.20/x
  3. Step 3: Cross multiply
    975.96x = 1,345.32 × 955.20
  4. Step 4: Simplify right side
    975.96x = 1,285,049.66
  5. Step 5: Solve for x
    x = 1,285,049.66/975.96
  6. Step 6: Final answer
    x = 1,316.70

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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.