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Finding the Fourth Proportional to 1,182.77, 1,632.24 and 685.45

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Solution

The fourth proportional to 1,182.77, 1,632.24 and 685.45 is: 945.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,182.77 : 1,632.24 = 685.45 : x
  2. Step 2: Convert to fraction form
    1,182.77/1,632.24 = 685.45/x
  3. Step 3: Cross multiply
    1,182.77x = 1,632.24 × 685.45
  4. Step 4: Simplify right side
    1,182.77x = 1,118,810.75
  5. Step 5: Solve for x
    x = 1,118,810.75/1,182.77
  6. Step 6: Final answer
    x = 945.92

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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.