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Finding the Fourth Proportional to 318,381.94, 439,368.30 and 173,187.72

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Solution

The fourth proportional to 318,381.94, 439,368.30 and 173,187.72 is: 238,999.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,381.94 : 439,368.30 = 173,187.72 : x
  2. Step 2: Convert to fraction form
    318,381.94/439,368.30 = 173,187.72/x
  3. Step 3: Cross multiply
    318,381.94x = 439,368.30 × 173,187.72
  4. Step 4: Simplify right side
    318,381.94x = 76,093,194,117.28
  5. Step 5: Solve for x
    x = 76,093,194,117.28/318,381.94
  6. Step 6: Final answer
    x = 238,999.72

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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.