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Finding the Fourth Proportional to 391,431.90, 540,166.86 and 230,297.34

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Solution

The fourth proportional to 391,431.90, 540,166.86 and 230,297.34 is: 317,804.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,431.90 : 540,166.86 = 230,297.34 : x
  2. Step 2: Convert to fraction form
    391,431.90/540,166.86 = 230,297.34/x
  3. Step 3: Cross multiply
    391,431.90x = 540,166.86 × 230,297.34
  4. Step 4: Simplify right side
    391,431.90x = 124,398,991,014.15
  5. Step 5: Solve for x
    x = 124,398,991,014.15/391,431.90
  6. Step 6: Final answer
    x = 317,804.94

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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.