Home / 645,431.88-890,717.94-355,056.24

Finding the Fourth Proportional to 645,431.88, 890,717.94 and 355,056.24

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Solution

The fourth proportional to 645,431.88, 890,717.94 and 355,056.24 is: 489,989.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,431.88 : 890,717.94 = 355,056.24 : x
  2. Step 2: Convert to fraction form
    645,431.88/890,717.94 = 355,056.24/x
  3. Step 3: Cross multiply
    645,431.88x = 890,717.94 × 355,056.24
  4. Step 4: Simplify right side
    645,431.88x = 316,254,962,676.95
  5. Step 5: Solve for x
    x = 316,254,962,676.95/645,431.88
  6. Step 6: Final answer
    x = 489,989.68

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1.5x scale

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.