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Finding the Fourth Proportional to 667,036.96, 920,516.88 and 395,120.32

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Solution

The fourth proportional to 667,036.96, 920,516.88 and 395,120.32 is: 545,269.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,036.96 : 920,516.88 = 395,120.32 : x
  2. Step 2: Convert to fraction form
    667,036.96/920,516.88 = 395,120.32/x
  3. Step 3: Cross multiply
    667,036.96x = 920,516.88 × 395,120.32
  4. Step 4: Simplify right side
    667,036.96x = 363,714,924,191.00
  5. Step 5: Solve for x
    x = 363,714,924,191.00/667,036.96
  6. Step 6: Final answer
    x = 545,269.52

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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.