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Finding the Fourth Proportional to 677,831.28, 935,487 and 376,044.72

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Solution

The fourth proportional to 677,831.28, 935,487 and 376,044.72 is: 518,986.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,831.28 : 935,487 = 376,044.72 : x
  2. Step 2: Convert to fraction form
    677,831.28/935,487 = 376,044.72/x
  3. Step 3: Cross multiply
    677,831.28x = 935,487 × 376,044.72
  4. Step 4: Simplify right side
    677,831.28x = 351,784,946,978.64
  5. Step 5: Solve for x
    x = 351,784,946,978.64/677,831.28
  6. Step 6: Final answer
    x = 518,986.00

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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.