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Finding the Fourth Proportional to 945.45, 1,303.97 and 698.40

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Solution

The fourth proportional to 945.45, 1,303.97 and 698.40 is: 963.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.45 : 1,303.97 = 698.40 : x
  2. Step 2: Convert to fraction form
    945.45/1,303.97 = 698.40/x
  3. Step 3: Cross multiply
    945.45x = 1,303.97 × 698.40
  4. Step 4: Simplify right side
    945.45x = 910,689.16
  5. Step 5: Solve for x
    x = 910,689.16/945.45
  6. Step 6: Final answer
    x = 963.23

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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.