Home / 399,305.35-551,032.63-218,010.34

Finding the Fourth Proportional to 399,305.35, 551,032.63 and 218,010.34

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Solution

The fourth proportional to 399,305.35, 551,032.63 and 218,010.34 is: 300,849.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,305.35 : 551,032.63 = 218,010.34 : x
  2. Step 2: Convert to fraction form
    399,305.35/551,032.63 = 218,010.34/x
  3. Step 3: Cross multiply
    399,305.35x = 551,032.63 × 218,010.34
  4. Step 4: Simplify right side
    399,305.35x = 120,130,811,017.39
  5. Step 5: Solve for x
    x = 120,130,811,017.39/399,305.35
  6. Step 6: Final answer
    x = 300,849.49

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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.