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Finding the Fourth Proportional to 323,999.70, 485,999.55 and 288,570.30

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Solution

The fourth proportional to 323,999.70, 485,999.55 and 288,570.30 is: 432,855.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,999.70 : 485,999.55 = 288,570.30 : x
  2. Step 2: Convert to fraction form
    323,999.70/485,999.55 = 288,570.30/x
  3. Step 3: Cross multiply
    323,999.70x = 485,999.55 × 288,570.30
  4. Step 4: Simplify right side
    323,999.70x = 140,245,035,943.37
  5. Step 5: Solve for x
    x = 140,245,035,943.37/323,999.70
  6. Step 6: Final answer
    x = 432,855.45

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1.5x scale

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.