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Finding the Fourth Proportional to 1,925.52, 2,886.21 and 815.55

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Solution

The fourth proportional to 1,925.52, 2,886.21 and 815.55 is: 1,222.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,925.52 : 2,886.21 = 815.55 : x
  2. Step 2: Convert to fraction form
    1,925.52/2,886.21 = 815.55/x
  3. Step 3: Cross multiply
    1,925.52x = 2,886.21 × 815.55
  4. Step 4: Simplify right side
    1,925.52x = 2,353,848.57
  5. Step 5: Solve for x
    x = 2,353,848.57/1,925.52
  6. Step 6: Final answer
    x = 1,222.45

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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.