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Finding the Fourth Proportional to 318,411.49, 439,410.71 and 173,220.43

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Solution

The fourth proportional to 318,411.49, 439,410.71 and 173,220.43 is: 239,045.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,411.49 : 439,410.71 = 173,220.43 : x
  2. Step 2: Convert to fraction form
    318,411.49/439,410.71 = 173,220.43/x
  3. Step 3: Cross multiply
    318,411.49x = 439,410.71 × 173,220.43
  4. Step 4: Simplify right side
    318,411.49x = 76,114,912,132.81
  5. Step 5: Solve for x
    x = 76,114,912,132.81/318,411.49
  6. Step 6: Final answer
    x = 239,045.75

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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.