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Finding the Fourth Proportional to 393,089.40, 589,634.10 and 349,543.80

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Solution

The fourth proportional to 393,089.40, 589,634.10 and 349,543.80 is: 524,315.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,089.40 : 589,634.10 = 349,543.80 : x
  2. Step 2: Convert to fraction form
    393,089.40/589,634.10 = 349,543.80/x
  3. Step 3: Cross multiply
    393,089.40x = 589,634.10 × 349,543.80
  4. Step 4: Simplify right side
    393,089.40x = 206,102,943,923.58
  5. Step 5: Solve for x
    x = 206,102,943,923.58/393,089.40
  6. Step 6: Final answer
    x = 524,315.70

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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.