Home / 399,394.26-551,161.29-218,106.21

Finding the Fourth Proportional to 399,394.26, 551,161.29 and 218,106.21

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Solution

The fourth proportional to 399,394.26, 551,161.29 and 218,106.21 is: 300,985.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,394.26 : 551,161.29 = 218,106.21 : x
  2. Step 2: Convert to fraction form
    399,394.26/551,161.29 = 218,106.21/x
  3. Step 3: Cross multiply
    399,394.26x = 551,161.29 × 218,106.21
  4. Step 4: Simplify right side
    399,394.26x = 120,211,700,060.61
  5. Step 5: Solve for x
    x = 120,211,700,060.61/399,394.26
  6. Step 6: Final answer
    x = 300,985.05

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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.