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Finding the Fourth Proportional to 319,408.40, 479,501.40 and 161,555.60

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Solution

The fourth proportional to 319,408.40, 479,501.40 and 161,555.60 is: 242,530.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,408.40 : 479,501.40 = 161,555.60 : x
  2. Step 2: Convert to fraction form
    319,408.40/479,501.40 = 161,555.60/x
  3. Step 3: Cross multiply
    319,408.40x = 479,501.40 × 161,555.60
  4. Step 4: Simplify right side
    319,408.40x = 77,466,136,377.84
  5. Step 5: Solve for x
    x = 77,466,136,377.84/319,408.40
  6. Step 6: Final answer
    x = 242,530.05

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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.