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Finding the Fourth Proportional to 361,856.40, 543,130.20 and 309,325.20

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Solution

The fourth proportional to 361,856.40, 543,130.20 and 309,325.20 is: 464,283.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,856.40 : 543,130.20 = 309,325.20 : x
  2. Step 2: Convert to fraction form
    361,856.40/543,130.20 = 309,325.20/x
  3. Step 3: Cross multiply
    361,856.40x = 543,130.20 × 309,325.20
  4. Step 4: Simplify right side
    361,856.40x = 168,003,857,741.04
  5. Step 5: Solve for x
    x = 168,003,857,741.04/361,856.40
  6. Step 6: Final answer
    x = 464,283.23

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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.