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Finding the Fourth Proportional to 611,290.60, 916,976.40 and 162,005.20

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Solution

The fourth proportional to 611,290.60, 916,976.40 and 162,005.20 is: 243,018.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,290.60 : 916,976.40 = 162,005.20 : x
  2. Step 2: Convert to fraction form
    611,290.60/916,976.40 = 162,005.20/x
  3. Step 3: Cross multiply
    611,290.60x = 916,976.40 × 162,005.20
  4. Step 4: Simplify right side
    611,290.60x = 148,554,945,077.28
  5. Step 5: Solve for x
    x = 148,554,945,077.28/611,290.60
  6. Step 6: Final answer
    x = 243,018.53

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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.