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Finding the Fourth Proportional to 289,239.40, 433,664.70 and 131,386.60

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Solution

The fourth proportional to 289,239.40, 433,664.70 and 131,386.60 is: 196,991.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,239.40 : 433,664.70 = 131,386.60 : x
  2. Step 2: Convert to fraction form
    289,239.40/433,664.70 = 131,386.60/x
  3. Step 3: Cross multiply
    289,239.40x = 433,664.70 × 131,386.60
  4. Step 4: Simplify right side
    289,239.40x = 56,977,730,473.02
  5. Step 5: Solve for x
    x = 56,977,730,473.02/289,239.40
  6. Step 6: Final answer
    x = 196,991.59

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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.