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Finding the Fourth Proportional to 611,965.60, 918,005.04 and 238,016.80

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Solution

The fourth proportional to 611,965.60, 918,005.04 and 238,016.80 is: 357,047.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,965.60 : 918,005.04 = 238,016.80 : x
  2. Step 2: Convert to fraction form
    611,965.60/918,005.04 = 238,016.80/x
  3. Step 3: Cross multiply
    611,965.60x = 918,005.04 × 238,016.80
  4. Step 4: Simplify right side
    611,965.60x = 218,500,622,004.67
  5. Step 5: Solve for x
    x = 218,500,622,004.67/611,965.60
  6. Step 6: Final answer
    x = 357,047.23

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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.