Home / 820,430.96-1,230,790.95-280,560.32

Finding the Fourth Proportional to 820,430.96, 1,230,790.95 and 280,560.32

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Solution

The fourth proportional to 820,430.96, 1,230,790.95 and 280,560.32 is: 420,889.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,430.96 : 1,230,790.95 = 280,560.32 : x
  2. Step 2: Convert to fraction form
    820,430.96/1,230,790.95 = 280,560.32/x
  3. Step 3: Cross multiply
    820,430.96x = 1,230,790.95 × 280,560.32
  4. Step 4: Simplify right side
    820,430.96x = 345,311,102,785.10
  5. Step 5: Solve for x
    x = 345,311,102,785.10/820,430.96
  6. Step 6: Final answer
    x = 420,889.90

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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.