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Finding the Fourth Proportional to 1,211,570.04, 1,671,978.08 and 667,725.44

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Solution

The fourth proportional to 1,211,570.04, 1,671,978.08 and 667,725.44 is: 921,467.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,570.04 : 1,671,978.08 = 667,725.44 : x
  2. Step 2: Convert to fraction form
    1,211,570.04/1,671,978.08 = 667,725.44/x
  3. Step 3: Cross multiply
    1,211,570.04x = 1,671,978.08 × 667,725.44
  4. Step 4: Simplify right side
    1,211,570.04x = 1,116,422,299,138.36
  5. Step 5: Solve for x
    x = 1,116,422,299,138.36/1,211,570.04
  6. Step 6: Final answer
    x = 921,467.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.