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Finding the Fourth Proportional to 620,905.50, 856,850.67 and 352,633.50

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Solution

The fourth proportional to 620,905.50, 856,850.67 and 352,633.50 is: 486,634.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,905.50 : 856,850.67 = 352,633.50 : x
  2. Step 2: Convert to fraction form
    620,905.50/856,850.67 = 352,633.50/x
  3. Step 3: Cross multiply
    620,905.50x = 856,850.67 × 352,633.50
  4. Step 4: Simplify right side
    620,905.50x = 302,154,250,739.45
  5. Step 5: Solve for x
    x = 302,154,250,739.45/620,905.50
  6. Step 6: Final answer
    x = 486,634.84

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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.