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Finding the Fourth Proportional to 1,363.50, 1,881 and 970.74

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Solution

The fourth proportional to 1,363.50, 1,881 and 970.74 is: 1,339.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,363.50 : 1,881 = 970.74 : x
  2. Step 2: Convert to fraction form
    1,363.50/1,881 = 970.74/x
  3. Step 3: Cross multiply
    1,363.50x = 1,881 × 970.74
  4. Step 4: Simplify right side
    1,363.50x = 1,825,961.94
  5. Step 5: Solve for x
    x = 1,825,961.94/1,363.50
  6. Step 6: Final answer
    x = 1,339.17

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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.