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Finding the Fourth Proportional to 318,411.61, 439,410.88 and 173,220.56

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Solution

The fourth proportional to 318,411.61, 439,410.88 and 173,220.56 is: 239,045.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,411.61 : 439,410.88 = 173,220.56 : x
  2. Step 2: Convert to fraction form
    318,411.61/439,410.88 = 173,220.56/x
  3. Step 3: Cross multiply
    318,411.61x = 439,410.88 × 173,220.56
  4. Step 4: Simplify right side
    318,411.61x = 76,114,998,370.95
  5. Step 5: Solve for x
    x = 76,114,998,370.95/318,411.61
  6. Step 6: Final answer
    x = 239,045.92

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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.