Home / 1,277.60-1,916.40-1,200.65

Finding the Fourth Proportional to 1,277.60, 1,916.40 and 1,200.65

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Solution

The fourth proportional to 1,277.60, 1,916.40 and 1,200.65 is: 1,800.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.60 : 1,916.40 = 1,200.65 : x
  2. Step 2: Convert to fraction form
    1,277.60/1,916.40 = 1,200.65/x
  3. Step 3: Cross multiply
    1,277.60x = 1,916.40 × 1,200.65
  4. Step 4: Simplify right side
    1,277.60x = 2,300,925.66
  5. Step 5: Solve for x
    x = 2,300,925.66/1,277.60
  6. Step 6: Final answer
    x = 1,800.98

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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.