Home / 399,331.25-551,088.47-218,054.69

Finding the Fourth Proportional to 399,331.25, 551,088.47 and 218,054.69

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Solution

The fourth proportional to 399,331.25, 551,088.47 and 218,054.69 is: 300,921.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,331.25 : 551,088.47 = 218,054.69 : x
  2. Step 2: Convert to fraction form
    399,331.25/551,088.47 = 218,054.69/x
  3. Step 3: Cross multiply
    399,331.25x = 551,088.47 × 218,054.69
  4. Step 4: Simplify right side
    399,331.25x = 120,167,423,278.12
  5. Step 5: Solve for x
    x = 120,167,423,278.12/399,331.25
  6. Step 6: Final answer
    x = 300,921.67

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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.