Home / 1,970.18-2,715.90-1,305.87

Finding the Fourth Proportional to 1,970.18, 2,715.90 and 1,305.87

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Solution

The fourth proportional to 1,970.18, 2,715.90 and 1,305.87 is: 1,800.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,970.18 : 2,715.90 = 1,305.87 : x
  2. Step 2: Convert to fraction form
    1,970.18/2,715.90 = 1,305.87/x
  3. Step 3: Cross multiply
    1,970.18x = 2,715.90 × 1,305.87
  4. Step 4: Simplify right side
    1,970.18x = 3,546,612.33
  5. Step 5: Solve for x
    x = 3,546,612.33/1,970.18
  6. Step 6: Final answer
    x = 1,800.15

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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.