Home / 645,173.89-890,289.53-358,676.53

Finding the Fourth Proportional to 645,173.89, 890,289.53 and 358,676.53

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Solution

The fourth proportional to 645,173.89, 890,289.53 and 358,676.53 is: 494,945.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,173.89 : 890,289.53 = 358,676.53 : x
  2. Step 2: Convert to fraction form
    645,173.89/890,289.53 = 358,676.53/x
  3. Step 3: Cross multiply
    645,173.89x = 890,289.53 × 358,676.53
  4. Step 4: Simplify right side
    645,173.89x = 319,325,959,315.73
  5. Step 5: Solve for x
    x = 319,325,959,315.73/645,173.89
  6. Step 6: Final answer
    x = 494,945.57

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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.