Home / 386,485.80-579,440.70-199,631.40

Finding the Fourth Proportional to 386,485.80, 579,440.70 and 199,631.40

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Solution

The fourth proportional to 386,485.80, 579,440.70 and 199,631.40 is: 299,298.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,485.80 : 579,440.70 = 199,631.40 : x
  2. Step 2: Convert to fraction form
    386,485.80/579,440.70 = 199,631.40/x
  3. Step 3: Cross multiply
    386,485.80x = 579,440.70 × 199,631.40
  4. Step 4: Simplify right side
    386,485.80x = 115,674,558,157.98
  5. Step 5: Solve for x
    x = 115,674,558,157.98/386,485.80
  6. Step 6: Final answer
    x = 299,298.34

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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.