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Finding the Fourth Proportional to 318,842.72, 478,263.40 and 218,699.39

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Solution

The fourth proportional to 318,842.72, 478,263.40 and 218,699.39 is: 328,048.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,842.72 : 478,263.40 = 218,699.39 : x
  2. Step 2: Convert to fraction form
    318,842.72/478,263.40 = 218,699.39/x
  3. Step 3: Cross multiply
    318,842.72x = 478,263.40 × 218,699.39
  4. Step 4: Simplify right side
    318,842.72x = 104,595,910,901.26
  5. Step 5: Solve for x
    x = 104,595,910,901.26/318,842.72
  6. Step 6: Final answer
    x = 328,048.61

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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.