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Finding the Fourth Proportional to 421,422.01, 581,065.45 and 340,599.60

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Solution

The fourth proportional to 421,422.01, 581,065.45 and 340,599.60 is: 469,625.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,422.01 : 581,065.45 = 340,599.60 : x
  2. Step 2: Convert to fraction form
    421,422.01/581,065.45 = 340,599.60/x
  3. Step 3: Cross multiply
    421,422.01x = 581,065.45 × 340,599.60
  4. Step 4: Simplify right side
    421,422.01x = 197,910,658,992.32
  5. Step 5: Solve for x
    x = 197,910,658,992.32/421,422.01
  6. Step 6: Final answer
    x = 469,625.83

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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.