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Finding the Fourth Proportional to 399,417.50, 551,200.53 and 218,134.77

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Solution

The fourth proportional to 399,417.50, 551,200.53 and 218,134.77 is: 301,028.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,417.50 : 551,200.53 = 218,134.77 : x
  2. Step 2: Convert to fraction form
    399,417.50/551,200.53 = 218,134.77/x
  3. Step 3: Cross multiply
    399,417.50x = 551,200.53 × 218,134.77
  4. Step 4: Simplify right side
    399,417.50x = 120,236,000,835.43
  5. Step 5: Solve for x
    x = 120,236,000,835.43/399,417.50
  6. Step 6: Final answer
    x = 301,028.38

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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.