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Finding the Fourth Proportional to 288,988.40, 433,485.79 and 129,072.46

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Solution

The fourth proportional to 288,988.40, 433,485.79 and 129,072.46 is: 193,610.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,988.40 : 433,485.79 = 129,072.46 : x
  2. Step 2: Convert to fraction form
    288,988.40/433,485.79 = 129,072.46/x
  3. Step 3: Cross multiply
    288,988.40x = 433,485.79 × 129,072.46
  4. Step 4: Simplify right side
    288,988.40x = 55,951,075,122.91
  5. Step 5: Solve for x
    x = 55,951,075,122.91/288,988.40
  6. Step 6: Final answer
    x = 193,610.11

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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.