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Finding the Fourth Proportional to 519,639.40, 779,718.30 and 295,172.20

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Solution

The fourth proportional to 519,639.40, 779,718.30 and 295,172.20 is: 442,905.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,639.40 : 779,718.30 = 295,172.20 : x
  2. Step 2: Convert to fraction form
    519,639.40/779,718.30 = 295,172.20/x
  3. Step 3: Cross multiply
    519,639.40x = 779,718.30 × 295,172.20
  4. Step 4: Simplify right side
    519,639.40x = 230,151,165,991.26
  5. Step 5: Solve for x
    x = 230,151,165,991.26/519,639.40
  6. Step 6: Final answer
    x = 442,905.53

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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.