Home / 1,440.10-2,156.37-1,115.74

Finding the Fourth Proportional to 1,440.10, 2,156.37 and 1,115.74

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Solution

The fourth proportional to 1,440.10, 2,156.37 and 1,115.74 is: 1,670.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.10 : 2,156.37 = 1,115.74 : x
  2. Step 2: Convert to fraction form
    1,440.10/2,156.37 = 1,115.74/x
  3. Step 3: Cross multiply
    1,440.10x = 2,156.37 × 1,115.74
  4. Step 4: Simplify right side
    1,440.10x = 2,405,948.26
  5. Step 5: Solve for x
    x = 2,405,948.26/1,440.10
  6. Step 6: Final answer
    x = 1,670.68

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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.