Home / 1,560.63-2,152.91-1,390.23

Finding the Fourth Proportional to 1,560.63, 2,152.91 and 1,390.23

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Solution

The fourth proportional to 1,560.63, 2,152.91 and 1,390.23 is: 1,917.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,560.63 : 2,152.91 = 1,390.23 : x
  2. Step 2: Convert to fraction form
    1,560.63/2,152.91 = 1,390.23/x
  3. Step 3: Cross multiply
    1,560.63x = 2,152.91 × 1,390.23
  4. Step 4: Simplify right side
    1,560.63x = 2,993,043.54
  5. Step 5: Solve for x
    x = 2,993,043.54/1,560.63
  6. Step 6: Final answer
    x = 1,917.84

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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.