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Finding the Fourth Proportional to 293,013.40, 439,811.70 and 143,422.60

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Solution

The fourth proportional to 293,013.40, 439,811.70 and 143,422.60 is: 215,276.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    293,013.40 : 439,811.70 = 143,422.60 : x
  2. Step 2: Convert to fraction form
    293,013.40/439,811.70 = 143,422.60/x
  3. Step 3: Cross multiply
    293,013.40x = 439,811.70 × 143,422.60
  4. Step 4: Simplify right side
    293,013.40x = 63,078,937,524.42
  5. Step 5: Solve for x
    x = 63,078,937,524.42/293,013.40
  6. Step 6: Final answer
    x = 215,276.63

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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.