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Finding the Fourth Proportional to 606,885.70, 911,312.70 and 408,087.40

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Solution

The fourth proportional to 606,885.70, 911,312.70 and 408,087.40 is: 612,792.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,885.70 : 911,312.70 = 408,087.40 : x
  2. Step 2: Convert to fraction form
    606,885.70/911,312.70 = 408,087.40/x
  3. Step 3: Cross multiply
    606,885.70x = 911,312.70 × 408,087.40
  4. Step 4: Simplify right side
    606,885.70x = 371,895,230,329.98
  5. Step 5: Solve for x
    x = 371,895,230,329.98/606,885.70
  6. Step 6: Final answer
    x = 612,792.87

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1.5x scale

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.