Home / 1,485.68-2,215.36-1,385.16

Finding the Fourth Proportional to 1,485.68, 2,215.36 and 1,385.16

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Solution

The fourth proportional to 1,485.68, 2,215.36 and 1,385.16 is: 2,065.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.68 : 2,215.36 = 1,385.16 : x
  2. Step 2: Convert to fraction form
    1,485.68/2,215.36 = 1,385.16/x
  3. Step 3: Cross multiply
    1,485.68x = 2,215.36 × 1,385.16
  4. Step 4: Simplify right side
    1,485.68x = 3,068,628.06
  5. Step 5: Solve for x
    x = 3,068,628.06/1,485.68
  6. Step 6: Final answer
    x = 2,065.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.