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Finding the Fourth Proportional to 399,502.35, 551,309.60 and 218,214.25

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Solution

The fourth proportional to 399,502.35, 551,309.60 and 218,214.25 is: 301,133.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,502.35 : 551,309.60 = 218,214.25 : x
  2. Step 2: Convert to fraction form
    399,502.35/551,309.60 = 218,214.25/x
  3. Step 3: Cross multiply
    399,502.35x = 551,309.60 × 218,214.25
  4. Step 4: Simplify right side
    399,502.35x = 120,303,610,881.80
  5. Step 5: Solve for x
    x = 120,303,610,881.80/399,502.35
  6. Step 6: Final answer
    x = 301,133.68

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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.