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Finding the Fourth Proportional to 660,004.80, 990,007.20 and 474,763.20

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Solution

The fourth proportional to 660,004.80, 990,007.20 and 474,763.20 is: 712,144.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,004.80 : 990,007.20 = 474,763.20 : x
  2. Step 2: Convert to fraction form
    660,004.80/990,007.20 = 474,763.20/x
  3. Step 3: Cross multiply
    660,004.80x = 990,007.20 × 474,763.20
  4. Step 4: Simplify right side
    660,004.80x = 470,018,986,295.04
  5. Step 5: Solve for x
    x = 470,018,986,295.04/660,004.80
  6. Step 6: Final answer
    x = 712,144.80

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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.