Home / 1,126.45-1,688.05-837.55

Finding the Fourth Proportional to 1,126.45, 1,688.05 and 837.55

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Solution

The fourth proportional to 1,126.45, 1,688.05 and 837.55 is: 1,255.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.45 : 1,688.05 = 837.55 : x
  2. Step 2: Convert to fraction form
    1,126.45/1,688.05 = 837.55/x
  3. Step 3: Cross multiply
    1,126.45x = 1,688.05 × 837.55
  4. Step 4: Simplify right side
    1,126.45x = 1,413,826.28
  5. Step 5: Solve for x
    x = 1,413,826.28/1,126.45
  6. Step 6: Final answer
    x = 1,255.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.