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Finding the Fourth Proportional to 554.40, 828.36 and 554.40

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Solution

The fourth proportional to 554.40, 828.36 and 554.40 is: 828.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.40 : 828.36 = 554.40 : x
  2. Step 2: Convert to fraction form
    554.40/828.36 = 554.40/x
  3. Step 3: Cross multiply
    554.40x = 828.36 × 554.40
  4. Step 4: Simplify right side
    554.40x = 459,242.78
  5. Step 5: Solve for x
    x = 459,242.78/554.40
  6. Step 6: Final answer
    x = 828.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.