Home / 1,277.16-1,916.09-455.51

Finding the Fourth Proportional to 1,277.16, 1,916.09 and 455.51

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Solution

The fourth proportional to 1,277.16, 1,916.09 and 455.51 is: 683.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.16 : 1,916.09 = 455.51 : x
  2. Step 2: Convert to fraction form
    1,277.16/1,916.09 = 455.51/x
  3. Step 3: Cross multiply
    1,277.16x = 1,916.09 × 455.51
  4. Step 4: Simplify right side
    1,277.16x = 872,804.08
  5. Step 5: Solve for x
    x = 872,804.08/1,277.16
  6. Step 6: Final answer
    x = 683.39

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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.