Home / 1,277.50-1,916.43-455.60

Finding the Fourth Proportional to 1,277.50, 1,916.43 and 455.60

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Solution

The fourth proportional to 1,277.50, 1,916.43 and 455.60 is: 683.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.50 : 1,916.43 = 455.60 : x
  2. Step 2: Convert to fraction form
    1,277.50/1,916.43 = 455.60/x
  3. Step 3: Cross multiply
    1,277.50x = 1,916.43 × 455.60
  4. Step 4: Simplify right side
    1,277.50x = 873,113.65
  5. Step 5: Solve for x
    x = 873,113.65/1,277.50
  6. Step 6: Final answer
    x = 683.46

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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.