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Finding the Fourth Proportional to 305,729.40, 458,658.90 and 92,479.80

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Solution

The fourth proportional to 305,729.40, 458,658.90 and 92,479.80 is: 138,739.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,729.40 : 458,658.90 = 92,479.80 : x
  2. Step 2: Convert to fraction form
    305,729.40/458,658.90 = 92,479.80/x
  3. Step 3: Cross multiply
    305,729.40x = 458,658.90 × 92,479.80
  4. Step 4: Simplify right side
    305,729.40x = 42,416,683,340.22
  5. Step 5: Solve for x
    x = 42,416,683,340.22/305,729.40
  6. Step 6: Final answer
    x = 138,739.30

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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.