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Finding the Fourth Proportional to 611,359.20, 917,038.80 and 168,127.20

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Solution

The fourth proportional to 611,359.20, 917,038.80 and 168,127.20 is: 252,190.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,359.20 : 917,038.80 = 168,127.20 : x
  2. Step 2: Convert to fraction form
    611,359.20/917,038.80 = 168,127.20/x
  3. Step 3: Cross multiply
    611,359.20x = 917,038.80 × 168,127.20
  4. Step 4: Simplify right side
    611,359.20x = 154,179,165,735.36
  5. Step 5: Solve for x
    x = 154,179,165,735.36/611,359.20
  6. Step 6: Final answer
    x = 252,190.80

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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.