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Finding the Fourth Proportional to 963.08, 1,445.06 and 407.94

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Solution

The fourth proportional to 963.08, 1,445.06 and 407.94 is: 612.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.08 : 1,445.06 = 407.94 : x
  2. Step 2: Convert to fraction form
    963.08/1,445.06 = 407.94/x
  3. Step 3: Cross multiply
    963.08x = 1,445.06 × 407.94
  4. Step 4: Simplify right side
    963.08x = 589,502.41
  5. Step 5: Solve for x
    x = 589,502.41/963.08
  6. Step 6: Final answer
    x = 612.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.