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Finding the Fourth Proportional to 389,711.80, 583,401.30 and 347,721.40

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Solution

The fourth proportional to 389,711.80, 583,401.30 and 347,721.40 is: 520,541.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,711.80 : 583,401.30 = 347,721.40 : x
  2. Step 2: Convert to fraction form
    389,711.80/583,401.30 = 347,721.40/x
  3. Step 3: Cross multiply
    389,711.80x = 583,401.30 × 347,721.40
  4. Step 4: Simplify right side
    389,711.80x = 202,861,116,797.82
  5. Step 5: Solve for x
    x = 202,861,116,797.82/389,711.80
  6. Step 6: Final answer
    x = 520,541.38

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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.