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Finding the Fourth Proportional to 399,500.60, 551,307.18 and 218,212.48

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Solution

The fourth proportional to 399,500.60, 551,307.18 and 218,212.48 is: 301,131.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,500.60 : 551,307.18 = 218,212.48 : x
  2. Step 2: Convert to fraction form
    399,500.60/551,307.18 = 218,212.48/x
  3. Step 3: Cross multiply
    399,500.60x = 551,307.18 × 218,212.48
  4. Step 4: Simplify right side
    399,500.60x = 120,302,106,989.61
  5. Step 5: Solve for x
    x = 120,302,106,989.61/399,500.60
  6. Step 6: Final answer
    x = 301,131.23

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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.