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Finding the Fourth Proportional to 664,389.66, 916,887.54 and 374,101.05

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Solution

The fourth proportional to 664,389.66, 916,887.54 and 374,101.05 is: 516,276.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,389.66 : 916,887.54 = 374,101.05 : x
  2. Step 2: Convert to fraction form
    664,389.66/916,887.54 = 374,101.05/x
  3. Step 3: Cross multiply
    664,389.66x = 916,887.54 × 374,101.05
  4. Step 4: Simplify right side
    664,389.66x = 343,008,584,990.97
  5. Step 5: Solve for x
    x = 343,008,584,990.97/664,389.66
  6. Step 6: Final answer
    x = 516,276.23

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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.