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Finding the Fourth Proportional to 664,526.32, 917,014.44 and 378,019.60

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Solution

The fourth proportional to 664,526.32, 917,014.44 and 378,019.60 is: 521,648.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,526.32 : 917,014.44 = 378,019.60 : x
  2. Step 2: Convert to fraction form
    664,526.32/917,014.44 = 378,019.60/x
  3. Step 3: Cross multiply
    664,526.32x = 917,014.44 × 378,019.60
  4. Step 4: Simplify right side
    664,526.32x = 346,649,431,803.02
  5. Step 5: Solve for x
    x = 346,649,431,803.02/664,526.32
  6. Step 6: Final answer
    x = 521,648.91

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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.