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Finding the Fourth Proportional to 621,087, 857,750.64 and 427,996.77

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Solution

The fourth proportional to 621,087, 857,750.64 and 427,996.77 is: 591,083.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,087 : 857,750.64 = 427,996.77 : x
  2. Step 2: Convert to fraction form
    621,087/857,750.64 = 427,996.77/x
  3. Step 3: Cross multiply
    621,087x = 857,750.64 × 427,996.77
  4. Step 4: Simplify right side
    621,087x = 367,114,503,385.43
  5. Step 5: Solve for x
    x = 367,114,503,385.43/621,087
  6. Step 6: Final answer
    x = 591,083.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.