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Finding the Fourth Proportional to 318,666.30, 477,999.45 and 223,280.70

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Solution

The fourth proportional to 318,666.30, 477,999.45 and 223,280.70 is: 334,921.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,666.30 : 477,999.45 = 223,280.70 : x
  2. Step 2: Convert to fraction form
    318,666.30/477,999.45 = 223,280.70/x
  3. Step 3: Cross multiply
    318,666.30x = 477,999.45 × 223,280.70
  4. Step 4: Simplify right side
    318,666.30x = 106,728,051,795.62
  5. Step 5: Solve for x
    x = 106,728,051,795.62/318,666.30
  6. Step 6: Final answer
    x = 334,921.05

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1.5x scale

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.