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Finding the Fourth Proportional to 319,408.20, 479,112.30 and 293,603.40

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Solution

The fourth proportional to 319,408.20, 479,112.30 and 293,603.40 is: 440,405.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,408.20 : 479,112.30 = 293,603.40 : x
  2. Step 2: Convert to fraction form
    319,408.20/479,112.30 = 293,603.40/x
  3. Step 3: Cross multiply
    319,408.20x = 479,112.30 × 293,603.40
  4. Step 4: Simplify right side
    319,408.20x = 140,669,000,261.82
  5. Step 5: Solve for x
    x = 140,669,000,261.82/319,408.20
  6. Step 6: Final answer
    x = 440,405.10

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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.