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Finding the Fourth Proportional to 397,131.88, 548,762.70 and 289,514.20

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Solution

The fourth proportional to 397,131.88, 548,762.70 and 289,514.20 is: 400,055.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,131.88 : 548,762.70 = 289,514.20 : x
  2. Step 2: Convert to fraction form
    397,131.88/548,762.70 = 289,514.20/x
  3. Step 3: Cross multiply
    397,131.88x = 548,762.70 × 289,514.20
  4. Step 4: Simplify right side
    397,131.88x = 158,874,594,080.34
  5. Step 5: Solve for x
    x = 158,874,594,080.34/397,131.88
  6. Step 6: Final answer
    x = 400,055.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.