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Finding the Fourth Proportional to 499,830.80, 689,048.98 and 356,341.73

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Solution

The fourth proportional to 499,830.80, 689,048.98 and 356,341.73 is: 491,240.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,830.80 : 689,048.98 = 356,341.73 : x
  2. Step 2: Convert to fraction form
    499,830.80/689,048.98 = 356,341.73/x
  3. Step 3: Cross multiply
    499,830.80x = 689,048.98 × 356,341.73
  4. Step 4: Simplify right side
    499,830.80x = 245,536,901,251.84
  5. Step 5: Solve for x
    x = 245,536,901,251.84/499,830.80
  6. Step 6: Final answer
    x = 491,240.04

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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.