Home / 809,211.60-1,212,505.20-509,155.20

Finding the Fourth Proportional to 809,211.60, 1,212,505.20 and 509,155.20

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Solution

The fourth proportional to 809,211.60, 1,212,505.20 and 509,155.20 is: 762,907.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,211.60 : 1,212,505.20 = 509,155.20 : x
  2. Step 2: Convert to fraction form
    809,211.60/1,212,505.20 = 509,155.20/x
  3. Step 3: Cross multiply
    809,211.60x = 1,212,505.20 × 509,155.20
  4. Step 4: Simplify right side
    809,211.60x = 617,353,327,607.04
  5. Step 5: Solve for x
    x = 617,353,327,607.04/809,211.60
  6. Step 6: Final answer
    x = 762,907.16

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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.