Home / 1,179.05-1,628.27-971.28

Finding the Fourth Proportional to 1,179.05, 1,628.27 and 971.28

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Solution

The fourth proportional to 1,179.05, 1,628.27 and 971.28 is: 1,341.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179.05 : 1,628.27 = 971.28 : x
  2. Step 2: Convert to fraction form
    1,179.05/1,628.27 = 971.28/x
  3. Step 3: Cross multiply
    1,179.05x = 1,628.27 × 971.28
  4. Step 4: Simplify right side
    1,179.05x = 1,581,501.23
  5. Step 5: Solve for x
    x = 1,581,501.23/1,179.05
  6. Step 6: Final answer
    x = 1,341.34

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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.