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Finding the Fourth Proportional to 318,395.94, 439,346.37 and 215,254.43

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Solution

The fourth proportional to 318,395.94, 439,346.37 and 215,254.43 is: 297,024.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,395.94 : 439,346.37 = 215,254.43 : x
  2. Step 2: Convert to fraction form
    318,395.94/439,346.37 = 215,254.43/x
  3. Step 3: Cross multiply
    318,395.94x = 439,346.37 × 215,254.43
  4. Step 4: Simplify right side
    318,395.94x = 94,571,250,250.19
  5. Step 5: Solve for x
    x = 94,571,250,250.19/318,395.94
  6. Step 6: Final answer
    x = 297,024.05

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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.