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Finding the Fourth Proportional to 421,260.60, 581,271.76 and 239,976.12

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Solution

The fourth proportional to 421,260.60, 581,271.76 and 239,976.12 is: 331,128.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,260.60 : 581,271.76 = 239,976.12 : x
  2. Step 2: Convert to fraction form
    421,260.60/581,271.76 = 239,976.12/x
  3. Step 3: Cross multiply
    421,260.60x = 581,271.76 × 239,976.12
  4. Step 4: Simplify right side
    421,260.60x = 139,491,341,630.37
  5. Step 5: Solve for x
    x = 139,491,341,630.37/421,260.60
  6. Step 6: Final answer
    x = 331,128.38

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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.