Home / 1,639.02-2,262.16-931.18

Finding the Fourth Proportional to 1,639.02, 2,262.16 and 931.18

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Solution

The fourth proportional to 1,639.02, 2,262.16 and 931.18 is: 1,285.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.02 : 2,262.16 = 931.18 : x
  2. Step 2: Convert to fraction form
    1,639.02/2,262.16 = 931.18/x
  3. Step 3: Cross multiply
    1,639.02x = 2,262.16 × 931.18
  4. Step 4: Simplify right side
    1,639.02x = 2,106,478.15
  5. Step 5: Solve for x
    x = 2,106,478.15/1,639.02
  6. Step 6: Final answer
    x = 1,285.21

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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.