Home / 1,485.19-2,048.20-1,275.30

Finding the Fourth Proportional to 1,485.19, 2,048.20 and 1,275.30

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Solution

The fourth proportional to 1,485.19, 2,048.20 and 1,275.30 is: 1,758.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.19 : 2,048.20 = 1,275.30 : x
  2. Step 2: Convert to fraction form
    1,485.19/2,048.20 = 1,275.30/x
  3. Step 3: Cross multiply
    1,485.19x = 2,048.20 × 1,275.30
  4. Step 4: Simplify right side
    1,485.19x = 2,612,069.46
  5. Step 5: Solve for x
    x = 2,612,069.46/1,485.19
  6. Step 6: Final answer
    x = 1,758.74

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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.