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Finding the Fourth Proportional to 435,052.80, 654,328.80 and 389,563.20

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Solution

The fourth proportional to 435,052.80, 654,328.80 and 389,563.20 is: 585,911.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    435,052.80 : 654,328.80 = 389,563.20 : x
  2. Step 2: Convert to fraction form
    435,052.80/654,328.80 = 389,563.20/x
  3. Step 3: Cross multiply
    435,052.80x = 654,328.80 × 389,563.20
  4. Step 4: Simplify right side
    435,052.80x = 254,902,421,180.16
  5. Step 5: Solve for x
    x = 254,902,421,180.16/435,052.80
  6. Step 6: Final answer
    x = 585,911.46

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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.