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Finding the Fourth Proportional to 500,776.80, 691,311.45 and 285,875.34

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Solution

The fourth proportional to 500,776.80, 691,311.45 and 285,875.34 is: 394,644.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,776.80 : 691,311.45 = 285,875.34 : x
  2. Step 2: Convert to fraction form
    500,776.80/691,311.45 = 285,875.34/x
  3. Step 3: Cross multiply
    500,776.80x = 691,311.45 × 285,875.34
  4. Step 4: Simplify right side
    500,776.80x = 197,628,895,814.64
  5. Step 5: Solve for x
    x = 197,628,895,814.64/500,776.80
  6. Step 6: Final answer
    x = 394,644.67

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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.