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Finding the Fourth Proportional to 490,460.80, 734,719.20 and 432,011.20

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Solution

The fourth proportional to 490,460.80, 734,719.20 and 432,011.20 is: 647,160.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,460.80 : 734,719.20 = 432,011.20 : x
  2. Step 2: Convert to fraction form
    490,460.80/734,719.20 = 432,011.20/x
  3. Step 3: Cross multiply
    490,460.80x = 734,719.20 × 432,011.20
  4. Step 4: Simplify right side
    490,460.80x = 317,406,923,255.04
  5. Step 5: Solve for x
    x = 317,406,923,255.04/490,460.80
  6. Step 6: Final answer
    x = 647,160.64

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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.