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Finding the Fourth Proportional to 957.05, 1,434.18 and 545.31

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Solution

The fourth proportional to 957.05, 1,434.18 and 545.31 is: 817.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.05 : 1,434.18 = 545.31 : x
  2. Step 2: Convert to fraction form
    957.05/1,434.18 = 545.31/x
  3. Step 3: Cross multiply
    957.05x = 1,434.18 × 545.31
  4. Step 4: Simplify right side
    957.05x = 782,072.70
  5. Step 5: Solve for x
    x = 782,072.70/957.05
  6. Step 6: Final answer
    x = 817.17

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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.