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Finding the Fourth Proportional to 547,511.40, 821,121.30 and 168,431.40

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Solution

The fourth proportional to 547,511.40, 821,121.30 and 168,431.40 is: 252,602.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,511.40 : 821,121.30 = 168,431.40 : x
  2. Step 2: Convert to fraction form
    547,511.40/821,121.30 = 168,431.40/x
  3. Step 3: Cross multiply
    547,511.40x = 821,121.30 × 168,431.40
  4. Step 4: Simplify right side
    547,511.40x = 138,302,610,128.82
  5. Step 5: Solve for x
    x = 138,302,610,128.82/547,511.40
  6. Step 6: Final answer
    x = 252,602.25

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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.