Home / 1,392,831.78-2,089,248.36-919,406.49

Finding the Fourth Proportional to 1,392,831.78, 2,089,248.36 and 919,406.49

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Solution

The fourth proportional to 1,392,831.78, 2,089,248.36 and 919,406.49 is: 1,379,110.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,831.78 : 2,089,248.36 = 919,406.49 : x
  2. Step 2: Convert to fraction form
    1,392,831.78/2,089,248.36 = 919,406.49/x
  3. Step 3: Cross multiply
    1,392,831.78x = 2,089,248.36 × 919,406.49
  4. Step 4: Simplify right side
    1,392,831.78x = 1,920,868,501,405.86
  5. Step 5: Solve for x
    x = 1,920,868,501,405.86/1,392,831.78
  6. Step 6: Final answer
    x = 1,379,110.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.