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Finding the Fourth Proportional to 318,605.76, 477,839.30 and 105,323.28

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Solution

The fourth proportional to 318,605.76, 477,839.30 and 105,323.28 is: 157,962.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,605.76 : 477,839.30 = 105,323.28 : x
  2. Step 2: Convert to fraction form
    318,605.76/477,839.30 = 105,323.28/x
  3. Step 3: Cross multiply
    318,605.76x = 477,839.30 × 105,323.28
  4. Step 4: Simplify right side
    318,605.76x = 50,327,602,388.90
  5. Step 5: Solve for x
    x = 50,327,602,388.90/318,605.76
  6. Step 6: Final answer
    x = 157,962.00

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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.