Home / 1,288.04-1,776.56-845.78

Finding the Fourth Proportional to 1,288.04, 1,776.56 and 845.78

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Solution

The fourth proportional to 1,288.04, 1,776.56 and 845.78 is: 1,166.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.04 : 1,776.56 = 845.78 : x
  2. Step 2: Convert to fraction form
    1,288.04/1,776.56 = 845.78/x
  3. Step 3: Cross multiply
    1,288.04x = 1,776.56 × 845.78
  4. Step 4: Simplify right side
    1,288.04x = 1,502,579.13
  5. Step 5: Solve for x
    x = 1,502,579.13/1,288.04
  6. Step 6: Final answer
    x = 1,166.56

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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.