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Finding the Fourth Proportional to 612,831.80, 919,360.65 and 275,880.68

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Solution

The fourth proportional to 612,831.80, 919,360.65 and 275,880.68 is: 413,871.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,831.80 : 919,360.65 = 275,880.68 : x
  2. Step 2: Convert to fraction form
    612,831.80/919,360.65 = 275,880.68/x
  3. Step 3: Cross multiply
    612,831.80x = 919,360.65 × 275,880.68
  4. Step 4: Simplify right side
    612,831.80x = 253,633,841,287.24
  5. Step 5: Solve for x
    x = 253,633,841,287.24/612,831.80
  6. Step 6: Final answer
    x = 413,871.87

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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.