Home / 1,285.12-1,925.76-1,055.64

Finding the Fourth Proportional to 1,285.12, 1,925.76 and 1,055.64

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Solution

The fourth proportional to 1,285.12, 1,925.76 and 1,055.64 is: 1,581.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.12 : 1,925.76 = 1,055.64 : x
  2. Step 2: Convert to fraction form
    1,285.12/1,925.76 = 1,055.64/x
  3. Step 3: Cross multiply
    1,285.12x = 1,925.76 × 1,055.64
  4. Step 4: Simplify right side
    1,285.12x = 2,032,909.29
  5. Step 5: Solve for x
    x = 2,032,909.29/1,285.12
  6. Step 6: Final answer
    x = 1,581.88

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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.