Home / 1,631.40-2,254.14-1,339.80

Finding the Fourth Proportional to 1,631.40, 2,254.14 and 1,339.80

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Solution

The fourth proportional to 1,631.40, 2,254.14 and 1,339.80 is: 1,851.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,631.40 : 2,254.14 = 1,339.80 : x
  2. Step 2: Convert to fraction form
    1,631.40/2,254.14 = 1,339.80/x
  3. Step 3: Cross multiply
    1,631.40x = 2,254.14 × 1,339.80
  4. Step 4: Simplify right side
    1,631.40x = 3,020,096.77
  5. Step 5: Solve for x
    x = 3,020,096.77/1,631.40
  6. Step 6: Final answer
    x = 1,851.23

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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.