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Finding the Fourth Proportional to 358,954.80, 538,432.20 and 309,091.20

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Solution

The fourth proportional to 358,954.80, 538,432.20 and 309,091.20 is: 463,636.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,954.80 : 538,432.20 = 309,091.20 : x
  2. Step 2: Convert to fraction form
    358,954.80/538,432.20 = 309,091.20/x
  3. Step 3: Cross multiply
    358,954.80x = 538,432.20 × 309,091.20
  4. Step 4: Simplify right side
    358,954.80x = 166,424,654,816.64
  5. Step 5: Solve for x
    x = 166,424,654,816.64/358,954.80
  6. Step 6: Final answer
    x = 463,636.80

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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.