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Finding the Fourth Proportional to 666,999.15, 920,457.86 and 361,074.03

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Solution

The fourth proportional to 666,999.15, 920,457.86 and 361,074.03 is: 498,281.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,999.15 : 920,457.86 = 361,074.03 : x
  2. Step 2: Convert to fraction form
    666,999.15/920,457.86 = 361,074.03/x
  3. Step 3: Cross multiply
    666,999.15x = 920,457.86 × 361,074.03
  4. Step 4: Simplify right side
    666,999.15x = 332,353,427,150.01
  5. Step 5: Solve for x
    x = 332,353,427,150.01/666,999.15
  6. Step 6: Final answer
    x = 498,281.64

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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.