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Finding the Fourth Proportional to 690,591.42, 953,064 and 418,670.64

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Solution

The fourth proportional to 690,591.42, 953,064 and 418,670.64 is: 577,794.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,591.42 : 953,064 = 418,670.64 : x
  2. Step 2: Convert to fraction form
    690,591.42/953,064 = 418,670.64/x
  3. Step 3: Cross multiply
    690,591.42x = 953,064 × 418,670.64
  4. Step 4: Simplify right side
    690,591.42x = 399,019,914,840.96
  5. Step 5: Solve for x
    x = 399,019,914,840.96/690,591.42
  6. Step 6: Final answer
    x = 577,794.49

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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.