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Finding the Fourth Proportional to 389,910.60, 585,303.30 and 301,555.80

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Solution

The fourth proportional to 389,910.60, 585,303.30 and 301,555.80 is: 452,671.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,910.60 : 585,303.30 = 301,555.80 : x
  2. Step 2: Convert to fraction form
    389,910.60/585,303.30 = 301,555.80/x
  3. Step 3: Cross multiply
    389,910.60x = 585,303.30 × 301,555.80
  4. Step 4: Simplify right side
    389,910.60x = 176,501,604,874.14
  5. Step 5: Solve for x
    x = 176,501,604,874.14/389,910.60
  6. Step 6: Final answer
    x = 452,671.98

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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.