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Finding the Fourth Proportional to 955.14, 1,317 and 623.10

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Solution

The fourth proportional to 955.14, 1,317 and 623.10 is: 859.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.14 : 1,317 = 623.10 : x
  2. Step 2: Convert to fraction form
    955.14/1,317 = 623.10/x
  3. Step 3: Cross multiply
    955.14x = 1,317 × 623.10
  4. Step 4: Simplify right side
    955.14x = 820,622.70
  5. Step 5: Solve for x
    x = 820,622.70/955.14
  6. Step 6: Final answer
    x = 859.16

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1.5x scale

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.