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Finding the Fourth Proportional to 505,658.70, 758,378.70 and 221,348.70

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Solution

The fourth proportional to 505,658.70, 758,378.70 and 221,348.70 is: 331,975.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,658.70 : 758,378.70 = 221,348.70 : x
  2. Step 2: Convert to fraction form
    505,658.70/758,378.70 = 221,348.70/x
  3. Step 3: Cross multiply
    505,658.70x = 758,378.70 × 221,348.70
  4. Step 4: Simplify right side
    505,658.70x = 167,866,139,352.69
  5. Step 5: Solve for x
    x = 167,866,139,352.69/505,658.70
  6. Step 6: Final answer
    x = 331,975.18

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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.