Home / 1,556.99-2,148.18-927.20

Finding the Fourth Proportional to 1,556.99, 2,148.18 and 927.20

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Solution

The fourth proportional to 1,556.99, 2,148.18 and 927.20 is: 1,279.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,556.99 : 2,148.18 = 927.20 : x
  2. Step 2: Convert to fraction form
    1,556.99/2,148.18 = 927.20/x
  3. Step 3: Cross multiply
    1,556.99x = 2,148.18 × 927.20
  4. Step 4: Simplify right side
    1,556.99x = 1,991,784.91
  5. Step 5: Solve for x
    x = 1,991,784.91/1,556.99
  6. Step 6: Final answer
    x = 1,279.25

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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.