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Finding the Fourth Proportional to 430,940.80, 646,411.20 and 164,564.20

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Solution

The fourth proportional to 430,940.80, 646,411.20 and 164,564.20 is: 246,846.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,940.80 : 646,411.20 = 164,564.20 : x
  2. Step 2: Convert to fraction form
    430,940.80/646,411.20 = 164,564.20/x
  3. Step 3: Cross multiply
    430,940.80x = 646,411.20 × 164,564.20
  4. Step 4: Simplify right side
    430,940.80x = 106,376,141,999.04
  5. Step 5: Solve for x
    x = 106,376,141,999.04/430,940.80
  6. Step 6: Final answer
    x = 246,846.30

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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.