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Finding the Fourth Proportional to 2,088.80, 3,133.20 and 790.20

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Solution

The fourth proportional to 2,088.80, 3,133.20 and 790.20 is: 1,185.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,088.80 : 3,133.20 = 790.20 : x
  2. Step 2: Convert to fraction form
    2,088.80/3,133.20 = 790.20/x
  3. Step 3: Cross multiply
    2,088.80x = 3,133.20 × 790.20
  4. Step 4: Simplify right side
    2,088.80x = 2,475,854.64
  5. Step 5: Solve for x
    x = 2,475,854.64/2,088.80
  6. Step 6: Final answer
    x = 1,185.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.