Home / 389,639.20-584,458.80-223,290.40

Finding the Fourth Proportional to 389,639.20, 584,458.80 and 223,290.40

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Solution

The fourth proportional to 389,639.20, 584,458.80 and 223,290.40 is: 334,935.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,639.20 : 584,458.80 = 223,290.40 : x
  2. Step 2: Convert to fraction form
    389,639.20/584,458.80 = 223,290.40/x
  3. Step 3: Cross multiply
    389,639.20x = 584,458.80 × 223,290.40
  4. Step 4: Simplify right side
    389,639.20x = 130,504,039,235.52
  5. Step 5: Solve for x
    x = 130,504,039,235.52/389,639.20
  6. Step 6: Final answer
    x = 334,935.60

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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.