Home / 1,345.08-1,856.94-1,239.69

Finding the Fourth Proportional to 1,345.08, 1,856.94 and 1,239.69

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Solution

The fourth proportional to 1,345.08, 1,856.94 and 1,239.69 is: 1,711.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.08 : 1,856.94 = 1,239.69 : x
  2. Step 2: Convert to fraction form
    1,345.08/1,856.94 = 1,239.69/x
  3. Step 3: Cross multiply
    1,345.08x = 1,856.94 × 1,239.69
  4. Step 4: Simplify right side
    1,345.08x = 2,302,029.95
  5. Step 5: Solve for x
    x = 2,302,029.95/1,345.08
  6. Step 6: Final answer
    x = 1,711.44

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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.