Home / 2,289.56-3,159.70-1,345.40

Finding the Fourth Proportional to 2,289.56, 3,159.70 and 1,345.40

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Solution

The fourth proportional to 2,289.56, 3,159.70 and 1,345.40 is: 1,856.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,289.56 : 3,159.70 = 1,345.40 : x
  2. Step 2: Convert to fraction form
    2,289.56/3,159.70 = 1,345.40/x
  3. Step 3: Cross multiply
    2,289.56x = 3,159.70 × 1,345.40
  4. Step 4: Simplify right side
    2,289.56x = 4,251,060.38
  5. Step 5: Solve for x
    x = 4,251,060.38/2,289.56
  6. Step 6: Final answer
    x = 1,856.72

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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.