Home / 389,639.20-584,055.60-211,770.40

Finding the Fourth Proportional to 389,639.20, 584,055.60 and 211,770.40

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Solution

The fourth proportional to 389,639.20, 584,055.60 and 211,770.40 is: 317,436.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,639.20 : 584,055.60 = 211,770.40 : x
  2. Step 2: Convert to fraction form
    389,639.20/584,055.60 = 211,770.40/x
  3. Step 3: Cross multiply
    389,639.20x = 584,055.60 × 211,770.40
  4. Step 4: Simplify right side
    389,639.20x = 123,685,688,034.24
  5. Step 5: Solve for x
    x = 123,685,688,034.24/389,639.20
  6. Step 6: Final answer
    x = 317,436.46

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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.