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Finding the Fourth Proportional to 436,443.40, 654,665.10 and 120,900.16

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Solution

The fourth proportional to 436,443.40, 654,665.10 and 120,900.16 is: 181,350.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,443.40 : 654,665.10 = 120,900.16 : x
  2. Step 2: Convert to fraction form
    436,443.40/654,665.10 = 120,900.16/x
  3. Step 3: Cross multiply
    436,443.40x = 654,665.10 × 120,900.16
  4. Step 4: Simplify right side
    436,443.40x = 79,149,115,336.42
  5. Step 5: Solve for x
    x = 79,149,115,336.42/436,443.40
  6. Step 6: Final answer
    x = 181,350.24

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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.