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Finding the Fourth Proportional to 421,076.72, 581,078.86 and 230,085.72

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Solution

The fourth proportional to 421,076.72, 581,078.86 and 230,085.72 is: 317,514.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,076.72 : 581,078.86 = 230,085.72 : x
  2. Step 2: Convert to fraction form
    421,076.72/581,078.86 = 230,085.72/x
  3. Step 3: Cross multiply
    421,076.72x = 581,078.86 × 230,085.72
  4. Step 4: Simplify right side
    421,076.72x = 133,697,947,879.88
  5. Step 5: Solve for x
    x = 133,697,947,879.88/421,076.72
  6. Step 6: Final answer
    x = 317,514.46

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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.