Home / 645,672.69-890,787.65-403,863.39

Finding the Fourth Proportional to 645,672.69, 890,787.65 and 403,863.39

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Solution

The fourth proportional to 645,672.69, 890,787.65 and 403,863.39 is: 557,180.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,672.69 : 890,787.65 = 403,863.39 : x
  2. Step 2: Convert to fraction form
    645,672.69/890,787.65 = 403,863.39/x
  3. Step 3: Cross multiply
    645,672.69x = 890,787.65 × 403,863.39
  4. Step 4: Simplify right side
    645,672.69x = 359,756,518,079.82
  5. Step 5: Solve for x
    x = 359,756,518,079.82/645,672.69
  6. Step 6: Final answer
    x = 557,180.94

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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.