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Finding the Fourth Proportional to 1,509.81, 2,083.55 and 880.77

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Solution

The fourth proportional to 1,509.81, 2,083.55 and 880.77 is: 1,215.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,509.81 : 2,083.55 = 880.77 : x
  2. Step 2: Convert to fraction form
    1,509.81/2,083.55 = 880.77/x
  3. Step 3: Cross multiply
    1,509.81x = 2,083.55 × 880.77
  4. Step 4: Simplify right side
    1,509.81x = 1,835,128.33
  5. Step 5: Solve for x
    x = 1,835,128.33/1,509.81
  6. Step 6: Final answer
    x = 1,215.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.