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Finding the Fourth Proportional to 686,381.15, 946,885.61 and 431,872.67

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Solution

The fourth proportional to 686,381.15, 946,885.61 and 431,872.67 is: 595,782.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,381.15 : 946,885.61 = 431,872.67 : x
  2. Step 2: Convert to fraction form
    686,381.15/946,885.61 = 431,872.67/x
  3. Step 3: Cross multiply
    686,381.15x = 946,885.61 × 431,872.67
  4. Step 4: Simplify right side
    686,381.15x = 408,934,012,048.70
  5. Step 5: Solve for x
    x = 408,934,012,048.70/686,381.15
  6. Step 6: Final answer
    x = 595,782.70

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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.