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Finding the Fourth Proportional to 2,287.80, 3,430.20 and 900.30

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Solution

The fourth proportional to 2,287.80, 3,430.20 and 900.30 is: 1,349.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,287.80 : 3,430.20 = 900.30 : x
  2. Step 2: Convert to fraction form
    2,287.80/3,430.20 = 900.30/x
  3. Step 3: Cross multiply
    2,287.80x = 3,430.20 × 900.30
  4. Step 4: Simplify right side
    2,287.80x = 3,088,209.06
  5. Step 5: Solve for x
    x = 3,088,209.06/2,287.80
  6. Step 6: Final answer
    x = 1,349.86

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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.