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Finding the Fourth Proportional to 490,991.04, 732,902.16 and 421,318.08

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Solution

The fourth proportional to 490,991.04, 732,902.16 and 421,318.08 is: 628,901.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,991.04 : 732,902.16 = 421,318.08 : x
  2. Step 2: Convert to fraction form
    490,991.04/732,902.16 = 421,318.08/x
  3. Step 3: Cross multiply
    490,991.04x = 732,902.16 × 421,318.08
  4. Step 4: Simplify right side
    490,991.04x = 308,784,930,879.05
  5. Step 5: Solve for x
    x = 308,784,930,879.05/490,991.04
  6. Step 6: Final answer
    x = 628,901.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.