Home / 1,280.71-1,923.68-1,130.05

Finding the Fourth Proportional to 1,280.71, 1,923.68 and 1,130.05

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Solution

The fourth proportional to 1,280.71, 1,923.68 and 1,130.05 is: 1,697.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.71 : 1,923.68 = 1,130.05 : x
  2. Step 2: Convert to fraction form
    1,280.71/1,923.68 = 1,130.05/x
  3. Step 3: Cross multiply
    1,280.71x = 1,923.68 × 1,130.05
  4. Step 4: Simplify right side
    1,280.71x = 2,173,848.93
  5. Step 5: Solve for x
    x = 2,173,848.93/1,280.71
  6. Step 6: Final answer
    x = 1,697.38

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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.