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Finding the Fourth Proportional to 485,498.40, 670,274.79 and 431,634.33

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Solution

The fourth proportional to 485,498.40, 670,274.79 and 431,634.33 is: 595,910.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,498.40 : 670,274.79 = 431,634.33 : x
  2. Step 2: Convert to fraction form
    485,498.40/670,274.79 = 431,634.33/x
  3. Step 3: Cross multiply
    485,498.40x = 670,274.79 × 431,634.33
  4. Step 4: Simplify right side
    485,498.40x = 289,313,609,897.54
  5. Step 5: Solve for x
    x = 289,313,609,897.54/485,498.40
  6. Step 6: Final answer
    x = 595,910.53

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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.