Home / 1,556.84-2,148.19-1,225.15

Finding the Fourth Proportional to 1,556.84, 2,148.19 and 1,225.15

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Solution

The fourth proportional to 1,556.84, 2,148.19 and 1,225.15 is: 1,690.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,556.84 : 2,148.19 = 1,225.15 : x
  2. Step 2: Convert to fraction form
    1,556.84/2,148.19 = 1,225.15/x
  3. Step 3: Cross multiply
    1,556.84x = 2,148.19 × 1,225.15
  4. Step 4: Simplify right side
    1,556.84x = 2,631,846.55
  5. Step 5: Solve for x
    x = 2,631,846.55/1,556.84
  6. Step 6: Final answer
    x = 1,690.50

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Double scale
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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.