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Finding the Fourth Proportional to 667,038.96, 920,519.64 and 395,122.32

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Solution

The fourth proportional to 667,038.96, 920,519.64 and 395,122.32 is: 545,272.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,038.96 : 920,519.64 = 395,122.32 : x
  2. Step 2: Convert to fraction form
    667,038.96/920,519.64 = 395,122.32/x
  3. Step 3: Cross multiply
    667,038.96x = 920,519.64 × 395,122.32
  4. Step 4: Simplify right side
    667,038.96x = 363,717,855,762.37
  5. Step 5: Solve for x
    x = 363,717,855,762.37/667,038.96
  6. Step 6: Final answer
    x = 545,272.28

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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.