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Finding the Fourth Proportional to 1,485.79, 2,050.18 and 822.68

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Solution

The fourth proportional to 1,485.79, 2,050.18 and 822.68 is: 1,135.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.79 : 2,050.18 = 822.68 : x
  2. Step 2: Convert to fraction form
    1,485.79/2,050.18 = 822.68/x
  3. Step 3: Cross multiply
    1,485.79x = 2,050.18 × 822.68
  4. Step 4: Simplify right side
    1,485.79x = 1,686,637.46
  5. Step 5: Solve for x
    x = 1,686,637.46/1,485.79
  6. Step 6: Final answer
    x = 1,135.18

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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.