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Finding the Fourth Proportional to 439,211.70, 657,359.55 and 318,926.70

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Solution

The fourth proportional to 439,211.70, 657,359.55 and 318,926.70 is: 477,331.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,211.70 : 657,359.55 = 318,926.70 : x
  2. Step 2: Convert to fraction form
    439,211.70/657,359.55 = 318,926.70/x
  3. Step 3: Cross multiply
    439,211.70x = 657,359.55 × 318,926.70
  4. Step 4: Simplify right side
    439,211.70x = 209,649,511,994.99
  5. Step 5: Solve for x
    x = 209,649,511,994.99/439,211.70
  6. Step 6: Final answer
    x = 477,331.35

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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.