Home / 400,778.03-553,448.34-257,786.30

Finding the Fourth Proportional to 400,778.03, 553,448.34 and 257,786.30

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Solution

The fourth proportional to 400,778.03, 553,448.34 and 257,786.30 is: 355,986.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,778.03 : 553,448.34 = 257,786.30 : x
  2. Step 2: Convert to fraction form
    400,778.03/553,448.34 = 257,786.30/x
  3. Step 3: Cross multiply
    400,778.03x = 553,448.34 × 257,786.30
  4. Step 4: Simplify right side
    400,778.03x = 142,671,397,042.50
  5. Step 5: Solve for x
    x = 142,671,397,042.50/400,778.03
  6. Step 6: Final answer
    x = 355,986.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.