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Finding the Fourth Proportional to 872,002.10, 1,308,003.15 and 620,059.70

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Solution

The fourth proportional to 872,002.10, 1,308,003.15 and 620,059.70 is: 930,089.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,002.10 : 1,308,003.15 = 620,059.70 : x
  2. Step 2: Convert to fraction form
    872,002.10/1,308,003.15 = 620,059.70/x
  3. Step 3: Cross multiply
    872,002.10x = 1,308,003.15 × 620,059.70
  4. Step 4: Simplify right side
    872,002.10x = 811,040,040,788.06
  5. Step 5: Solve for x
    x = 811,040,040,788.06/872,002.10
  6. Step 6: Final answer
    x = 930,089.55

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Similar ratio
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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.