Home / 413,200.80-621,113.40-389,581.20

Finding the Fourth Proportional to 413,200.80, 621,113.40 and 389,581.20

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Solution

The fourth proportional to 413,200.80, 621,113.40 and 389,581.20 is: 585,608.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,200.80 : 621,113.40 = 389,581.20 : x
  2. Step 2: Convert to fraction form
    413,200.80/621,113.40 = 389,581.20/x
  3. Step 3: Cross multiply
    413,200.80x = 621,113.40 × 389,581.20
  4. Step 4: Simplify right side
    413,200.80x = 241,974,103,708.08
  5. Step 5: Solve for x
    x = 241,974,103,708.08/413,200.80
  6. Step 6: Final answer
    x = 585,608.99

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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.