Home / 1,688.06-2,531.90-455.40

Finding the Fourth Proportional to 1,688.06, 2,531.90 and 455.40

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Solution

The fourth proportional to 1,688.06, 2,531.90 and 455.40 is: 683.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.06 : 2,531.90 = 455.40 : x
  2. Step 2: Convert to fraction form
    1,688.06/2,531.90 = 455.40/x
  3. Step 3: Cross multiply
    1,688.06x = 2,531.90 × 455.40
  4. Step 4: Simplify right side
    1,688.06x = 1,153,028.40
  5. Step 5: Solve for x
    x = 1,153,028.40/1,688.06
  6. Step 6: Final answer
    x = 683.05

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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.