Home / 430,947.84-646,022.64-220,120.80

Finding the Fourth Proportional to 430,947.84, 646,022.64 and 220,120.80

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Solution

The fourth proportional to 430,947.84, 646,022.64 and 220,120.80 is: 329,977.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,947.84 : 646,022.64 = 220,120.80 : x
  2. Step 2: Convert to fraction form
    430,947.84/646,022.64 = 220,120.80/x
  3. Step 3: Cross multiply
    430,947.84x = 646,022.64 × 220,120.80
  4. Step 4: Simplify right side
    430,947.84x = 142,203,020,334.91
  5. Step 5: Solve for x
    x = 142,203,020,334.91/430,947.84
  6. Step 6: Final answer
    x = 329,977.34

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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.