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Finding the Fourth Proportional to 293,015.40, 439,814.70 and 143,424.60

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Solution

The fourth proportional to 293,015.40, 439,814.70 and 143,424.60 is: 215,279.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    293,015.40 : 439,814.70 = 143,424.60 : x
  2. Step 2: Convert to fraction form
    293,015.40/439,814.70 = 143,424.60/x
  3. Step 3: Cross multiply
    293,015.40x = 439,814.70 × 143,424.60
  4. Step 4: Simplify right side
    293,015.40x = 63,080,247,421.62
  5. Step 5: Solve for x
    x = 63,080,247,421.62/293,015.40
  6. Step 6: Final answer
    x = 215,279.63

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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.