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Finding the Fourth Proportional to 285,571.80, 394,281.54 and 255,259.98

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Solution

The fourth proportional to 285,571.80, 394,281.54 and 255,259.98 is: 352,430.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,571.80 : 394,281.54 = 255,259.98 : x
  2. Step 2: Convert to fraction form
    285,571.80/394,281.54 = 255,259.98/x
  3. Step 3: Cross multiply
    285,571.80x = 394,281.54 × 255,259.98
  4. Step 4: Simplify right side
    285,571.80x = 100,644,298,014.77
  5. Step 5: Solve for x
    x = 100,644,298,014.77/285,571.80
  6. Step 6: Final answer
    x = 352,430.80

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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.