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Finding the Fourth Proportional to 399,091.70, 598,637.55 and 328,232.90

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Solution

The fourth proportional to 399,091.70, 598,637.55 and 328,232.90 is: 492,349.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,091.70 : 598,637.55 = 328,232.90 : x
  2. Step 2: Convert to fraction form
    399,091.70/598,637.55 = 328,232.90/x
  3. Step 3: Cross multiply
    399,091.70x = 598,637.55 × 328,232.90
  4. Step 4: Simplify right side
    399,091.70x = 196,492,539,085.40
  5. Step 5: Solve for x
    x = 196,492,539,085.40/399,091.70
  6. Step 6: Final answer
    x = 492,349.35

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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.