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Finding the Fourth Proportional to 379,325.40, 523,479.63 and 209,570.46

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Solution

The fourth proportional to 379,325.40, 523,479.63 and 209,570.46 is: 289,213.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,325.40 : 523,479.63 = 209,570.46 : x
  2. Step 2: Convert to fraction form
    379,325.40/523,479.63 = 209,570.46/x
  3. Step 3: Cross multiply
    379,325.40x = 523,479.63 × 209,570.46
  4. Step 4: Simplify right side
    379,325.40x = 109,705,866,859.73
  5. Step 5: Solve for x
    x = 109,705,866,859.73/379,325.40
  6. Step 6: Final answer
    x = 289,213.08

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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.