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Finding the Fourth Proportional to 450,674.28, 621,211.68 and 305,434.80

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Solution

The fourth proportional to 450,674.28, 621,211.68 and 305,434.80 is: 421,012.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,674.28 : 621,211.68 = 305,434.80 : x
  2. Step 2: Convert to fraction form
    450,674.28/621,211.68 = 305,434.80/x
  3. Step 3: Cross multiply
    450,674.28x = 621,211.68 × 305,434.80
  4. Step 4: Simplify right side
    450,674.28x = 189,739,665,238.46
  5. Step 5: Solve for x
    x = 189,739,665,238.46/450,674.28
  6. Step 6: Final answer
    x = 421,012.85

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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.