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Finding the Fourth Proportional to 964.65, 1,441.11 and 615.21

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Solution

The fourth proportional to 964.65, 1,441.11 and 615.21 is: 919.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.65 : 1,441.11 = 615.21 : x
  2. Step 2: Convert to fraction form
    964.65/1,441.11 = 615.21/x
  3. Step 3: Cross multiply
    964.65x = 1,441.11 × 615.21
  4. Step 4: Simplify right side
    964.65x = 886,582.19
  5. Step 5: Solve for x
    x = 886,582.19/964.65
  6. Step 6: Final answer
    x = 919.07

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.