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Finding the Fourth Proportional to 620,893.80, 931,314.76 and 177,661.80

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Solution

The fourth proportional to 620,893.80, 931,314.76 and 177,661.80 is: 266,485.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,893.80 : 931,314.76 = 177,661.80 : x
  2. Step 2: Convert to fraction form
    620,893.80/931,314.76 = 177,661.80/x
  3. Step 3: Cross multiply
    620,893.80x = 931,314.76 × 177,661.80
  4. Step 4: Simplify right side
    620,893.80x = 165,459,056,628.17
  5. Step 5: Solve for x
    x = 165,459,056,628.17/620,893.80
  6. Step 6: Final answer
    x = 266,485.28

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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.