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Finding the Fourth Proportional to 974.10, 1,461.15 and 646.05

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Solution

The fourth proportional to 974.10, 1,461.15 and 646.05 is: 969.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.10 : 1,461.15 = 646.05 : x
  2. Step 2: Convert to fraction form
    974.10/1,461.15 = 646.05/x
  3. Step 3: Cross multiply
    974.10x = 1,461.15 × 646.05
  4. Step 4: Simplify right side
    974.10x = 943,975.96
  5. Step 5: Solve for x
    x = 943,975.96/974.10
  6. Step 6: Final answer
    x = 969.08

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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.