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Finding the Fourth Proportional to 1,363.86, 1,881.36 and 971.46

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Solution

The fourth proportional to 1,363.86, 1,881.36 and 971.46 is: 1,340.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,363.86 : 1,881.36 = 971.46 : x
  2. Step 2: Convert to fraction form
    1,363.86/1,881.36 = 971.46/x
  3. Step 3: Cross multiply
    1,363.86x = 1,881.36 × 971.46
  4. Step 4: Simplify right side
    1,363.86x = 1,827,665.99
  5. Step 5: Solve for x
    x = 1,827,665.99/1,363.86
  6. Step 6: Final answer
    x = 1,340.07

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1.5x scale

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.