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Finding the Fourth Proportional to 323,817.40, 485,514.90 and 290,639.80

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Solution

The fourth proportional to 323,817.40, 485,514.90 and 290,639.80 is: 435,770.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,817.40 : 485,514.90 = 290,639.80 : x
  2. Step 2: Convert to fraction form
    323,817.40/485,514.90 = 290,639.80/x
  3. Step 3: Cross multiply
    323,817.40x = 485,514.90 × 290,639.80
  4. Step 4: Simplify right side
    323,817.40x = 141,109,953,433.02
  5. Step 5: Solve for x
    x = 141,109,953,433.02/323,817.40
  6. Step 6: Final answer
    x = 435,770.14

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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.