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Finding the Fourth Proportional to 954.18, 1,315.40 and 622.53

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Solution

The fourth proportional to 954.18, 1,315.40 and 622.53 is: 858.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.18 : 1,315.40 = 622.53 : x
  2. Step 2: Convert to fraction form
    954.18/1,315.40 = 622.53/x
  3. Step 3: Cross multiply
    954.18x = 1,315.40 × 622.53
  4. Step 4: Simplify right side
    954.18x = 818,872.85
  5. Step 5: Solve for x
    x = 818,872.85/954.18
  6. Step 6: Final answer
    x = 858.20

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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.