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Finding the Fourth Proportional to 251,488.48, 347,048.40 and 138,308.80

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Solution

The fourth proportional to 251,488.48, 347,048.40 and 138,308.80 is: 190,863.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,488.48 : 347,048.40 = 138,308.80 : x
  2. Step 2: Convert to fraction form
    251,488.48/347,048.40 = 138,308.80/x
  3. Step 3: Cross multiply
    251,488.48x = 347,048.40 × 138,308.80
  4. Step 4: Simplify right side
    251,488.48x = 47,999,847,745.92
  5. Step 5: Solve for x
    x = 47,999,847,745.92/251,488.48
  6. Step 6: Final answer
    x = 190,863.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.