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Finding the Fourth Proportional to 318,885, 478,349.37 and 105,652.50

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Solution

The fourth proportional to 318,885, 478,349.37 and 105,652.50 is: 158,486.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,885 : 478,349.37 = 105,652.50 : x
  2. Step 2: Convert to fraction form
    318,885/478,349.37 = 105,652.50/x
  3. Step 3: Cross multiply
    318,885x = 478,349.37 × 105,652.50
  4. Step 4: Simplify right side
    318,885x = 50,538,806,813.93
  5. Step 5: Solve for x
    x = 50,538,806,813.93/318,885
  6. Step 6: Final answer
    x = 158,486.00

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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.