Home / 1,345.14-1,856.45-1,029.85

Finding the Fourth Proportional to 1,345.14, 1,856.45 and 1,029.85

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Solution

The fourth proportional to 1,345.14, 1,856.45 and 1,029.85 is: 1,421.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.14 : 1,856.45 = 1,029.85 : x
  2. Step 2: Convert to fraction form
    1,345.14/1,856.45 = 1,029.85/x
  3. Step 3: Cross multiply
    1,345.14x = 1,856.45 × 1,029.85
  4. Step 4: Simplify right side
    1,345.14x = 1,911,862.97
  5. Step 5: Solve for x
    x = 1,911,862.97/1,345.14
  6. Step 6: Final answer
    x = 1,421.31

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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.