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Finding the Fourth Proportional to 1,257.59, 1,886.85 and 526.79

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Solution

The fourth proportional to 1,257.59, 1,886.85 and 526.79 is: 790.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257.59 : 1,886.85 = 526.79 : x
  2. Step 2: Convert to fraction form
    1,257.59/1,886.85 = 526.79/x
  3. Step 3: Cross multiply
    1,257.59x = 1,886.85 × 526.79
  4. Step 4: Simplify right side
    1,257.59x = 993,964.28
  5. Step 5: Solve for x
    x = 993,964.28/1,257.59
  6. Step 6: Final answer
    x = 790.38

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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.