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Finding the Fourth Proportional to 436,871.64, 655,311.78 and 121,330.20

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Solution

The fourth proportional to 436,871.64, 655,311.78 and 121,330.20 is: 181,996.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,871.64 : 655,311.78 = 121,330.20 : x
  2. Step 2: Convert to fraction form
    436,871.64/655,311.78 = 121,330.20/x
  3. Step 3: Cross multiply
    436,871.64x = 655,311.78 × 121,330.20
  4. Step 4: Simplify right side
    436,871.64x = 79,509,109,329.76
  5. Step 5: Solve for x
    x = 79,509,109,329.76/436,871.64
  6. Step 6: Final answer
    x = 181,996.50

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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.