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Finding the Fourth Proportional to 259,218.70, 389,000.85 and 118,905.10

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Solution

The fourth proportional to 259,218.70, 389,000.85 and 118,905.10 is: 178,436.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,218.70 : 389,000.85 = 118,905.10 : x
  2. Step 2: Convert to fraction form
    259,218.70/389,000.85 = 118,905.10/x
  3. Step 3: Cross multiply
    259,218.70x = 389,000.85 × 118,905.10
  4. Step 4: Simplify right side
    259,218.70x = 46,254,184,969.34
  5. Step 5: Solve for x
    x = 46,254,184,969.34/259,218.70
  6. Step 6: Final answer
    x = 178,436.91

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1.5x scale

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.