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Finding the Fourth Proportional to 345,889.45, 477,254.86 and 209,994.94

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Solution

The fourth proportional to 345,889.45, 477,254.86 and 209,994.94 is: 289,748.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,889.45 : 477,254.86 = 209,994.94 : x
  2. Step 2: Convert to fraction form
    345,889.45/477,254.86 = 209,994.94/x
  3. Step 3: Cross multiply
    345,889.45x = 477,254.86 × 209,994.94
  4. Step 4: Simplify right side
    345,889.45x = 100,221,105,690.41
  5. Step 5: Solve for x
    x = 100,221,105,690.41/345,889.45
  6. Step 6: Final answer
    x = 289,748.95

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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.