Home / 646,140.48-969,155.20-393,355.36

Finding the Fourth Proportional to 646,140.48, 969,155.20 and 393,355.36

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Solution

The fourth proportional to 646,140.48, 969,155.20 and 393,355.36 is: 589,999.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,140.48 : 969,155.20 = 393,355.36 : x
  2. Step 2: Convert to fraction form
    646,140.48/969,155.20 = 393,355.36/x
  3. Step 3: Cross multiply
    646,140.48x = 969,155.20 × 393,355.36
  4. Step 4: Simplify right side
    646,140.48x = 381,222,392,591.87
  5. Step 5: Solve for x
    x = 381,222,392,591.87/646,140.48
  6. Step 6: Final answer
    x = 589,999.24

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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.