Home / 645,475.41-890,787.60-358,989.36

Finding the Fourth Proportional to 645,475.41, 890,787.60 and 358,989.36

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Solution

The fourth proportional to 645,475.41, 890,787.60 and 358,989.36 is: 495,422.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,475.41 : 890,787.60 = 358,989.36 : x
  2. Step 2: Convert to fraction form
    645,475.41/890,787.60 = 358,989.36/x
  3. Step 3: Cross multiply
    645,475.41x = 890,787.60 × 358,989.36
  4. Step 4: Simplify right side
    645,475.41x = 319,783,270,419.94
  5. Step 5: Solve for x
    x = 319,783,270,419.94/645,475.41
  6. Step 6: Final answer
    x = 495,422.85

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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.