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Finding the Fourth Proportional to 479,420.10, 718,474.05 and 319,040.10

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Solution

The fourth proportional to 479,420.10, 718,474.05 and 319,040.10 is: 478,123.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,420.10 : 718,474.05 = 319,040.10 : x
  2. Step 2: Convert to fraction form
    479,420.10/718,474.05 = 319,040.10/x
  3. Step 3: Cross multiply
    479,420.10x = 718,474.05 × 319,040.10
  4. Step 4: Simplify right side
    479,420.10x = 229,222,032,759.41
  5. Step 5: Solve for x
    x = 229,222,032,759.41/479,420.10
  6. Step 6: Final answer
    x = 478,123.53

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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.