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Finding the Third Proportional to 551,421 and 879,619.50

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Solution

The third proportional to 551,421 and 879,619.50 is: 1,403,157.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,421 : 879,619.50 = 879,619.50 : x
  2. Step 2: Convert to fraction form
    551,421/879,619.50 = 879,619.50/x
  3. Step 3: Cross multiply
    551,421x = 879,619.50 × 879,619.50
  4. Step 4: Simplify right side
    551,421x = 773,730,464,780.25
  5. Step 5: Solve for x
    x = 773,730,464,780.25/551,421
  6. Step 6: Final answer
    x = 1,403,157.41

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.