Home / 399,291.18-551,007.36-217,999.77

Finding the Fourth Proportional to 399,291.18, 551,007.36 and 217,999.77

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Solution

The fourth proportional to 399,291.18, 551,007.36 and 217,999.77 is: 300,831.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,291.18 : 551,007.36 = 217,999.77 : x
  2. Step 2: Convert to fraction form
    399,291.18/551,007.36 = 217,999.77/x
  3. Step 3: Cross multiply
    399,291.18x = 551,007.36 × 217,999.77
  4. Step 4: Simplify right side
    399,291.18x = 120,119,477,748.31
  5. Step 5: Solve for x
    x = 120,119,477,748.31/399,291.18
  6. Step 6: Final answer
    x = 300,831.78

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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.