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Finding the Fourth Proportional to 1,253.91, 1,878.80 and 886.89

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Solution

The fourth proportional to 1,253.91, 1,878.80 and 886.89 is: 1,328.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.91 : 1,878.80 = 886.89 : x
  2. Step 2: Convert to fraction form
    1,253.91/1,878.80 = 886.89/x
  3. Step 3: Cross multiply
    1,253.91x = 1,878.80 × 886.89
  4. Step 4: Simplify right side
    1,253.91x = 1,666,284.50
  5. Step 5: Solve for x
    x = 1,666,284.50/1,253.91
  6. Step 6: Final answer
    x = 1,328.87

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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.