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Finding the Fourth Proportional to 954.87, 1,318.50 and 623.13

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Solution

The fourth proportional to 954.87, 1,318.50 and 623.13 is: 860.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.87 : 1,318.50 = 623.13 : x
  2. Step 2: Convert to fraction form
    954.87/1,318.50 = 623.13/x
  3. Step 3: Cross multiply
    954.87x = 1,318.50 × 623.13
  4. Step 4: Simplify right side
    954.87x = 821,596.91
  5. Step 5: Solve for x
    x = 821,596.91/954.87
  6. Step 6: Final answer
    x = 860.43

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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.