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Finding the Fourth Proportional to 318,990.55, 478,579.38 and 94,356.89

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Solution

The fourth proportional to 318,990.55, 478,579.38 and 94,356.89 is: 141,563.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,990.55 : 478,579.38 = 94,356.89 : x
  2. Step 2: Convert to fraction form
    318,990.55/478,579.38 = 94,356.89/x
  3. Step 3: Cross multiply
    318,990.55x = 478,579.38 × 94,356.89
  4. Step 4: Simplify right side
    318,990.55x = 45,157,261,914.93
  5. Step 5: Solve for x
    x = 45,157,261,914.93/318,990.55
  6. Step 6: Final answer
    x = 141,563.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.