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Finding the Fourth Proportional to 490,849.40, 736,274.10 and 407,905.40

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Solution

The fourth proportional to 490,849.40, 736,274.10 and 407,905.40 is: 611,858.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,849.40 : 736,274.10 = 407,905.40 : x
  2. Step 2: Convert to fraction form
    490,849.40/736,274.10 = 407,905.40/x
  3. Step 3: Cross multiply
    490,849.40x = 736,274.10 × 407,905.40
  4. Step 4: Simplify right side
    490,849.40x = 300,330,181,270.14
  5. Step 5: Solve for x
    x = 300,330,181,270.14/490,849.40
  6. Step 6: Final answer
    x = 611,858.10

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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.