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Finding the Fourth Proportional to 499,436, 689,211.20 and 273,081.50

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Solution

The fourth proportional to 499,436, 689,211.20 and 273,081.50 is: 376,846.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,436 : 689,211.20 = 273,081.50 : x
  2. Step 2: Convert to fraction form
    499,436/689,211.20 = 273,081.50/x
  3. Step 3: Cross multiply
    499,436x = 689,211.20 × 273,081.50
  4. Step 4: Simplify right side
    499,436x = 188,210,828,312.80
  5. Step 5: Solve for x
    x = 188,210,828,312.80/499,436
  6. Step 6: Final answer
    x = 376,846.74

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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.