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Finding the Fourth Proportional to 956.36, 1,320.17 and 583.45

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Solution

The fourth proportional to 956.36, 1,320.17 and 583.45 is: 805.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.36 : 1,320.17 = 583.45 : x
  2. Step 2: Convert to fraction form
    956.36/1,320.17 = 583.45/x
  3. Step 3: Cross multiply
    956.36x = 1,320.17 × 583.45
  4. Step 4: Simplify right side
    956.36x = 770,253.19
  5. Step 5: Solve for x
    x = 770,253.19/956.36
  6. Step 6: Final answer
    x = 805.40

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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.