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Finding the Fourth Proportional to 413,149.80, 621,036.90 and 389,530.20

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Solution

The fourth proportional to 413,149.80, 621,036.90 and 389,530.20 is: 585,532.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,149.80 : 621,036.90 = 389,530.20 : x
  2. Step 2: Convert to fraction form
    413,149.80/621,036.90 = 389,530.20/x
  3. Step 3: Cross multiply
    413,149.80x = 621,036.90 × 389,530.20
  4. Step 4: Simplify right side
    413,149.80x = 241,912,627,864.38
  5. Step 5: Solve for x
    x = 241,912,627,864.38/413,149.80
  6. Step 6: Final answer
    x = 585,532.48

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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.