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Finding the Fourth Proportional to 611,351.20, 917,118.96 and 190,660

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Solution

The fourth proportional to 611,351.20, 917,118.96 and 190,660 is: 286,018.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,351.20 : 917,118.96 = 190,660 : x
  2. Step 2: Convert to fraction form
    611,351.20/917,118.96 = 190,660/x
  3. Step 3: Cross multiply
    611,351.20x = 917,118.96 × 190,660
  4. Step 4: Simplify right side
    611,351.20x = 174,857,900,913.60
  5. Step 5: Solve for x
    x = 174,857,900,913.60/611,351.20
  6. Step 6: Final answer
    x = 286,018.74

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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.