Home / 645,126.89-890,224.67-358,629.53

Finding the Fourth Proportional to 645,126.89, 890,224.67 and 358,629.53

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Solution

The fourth proportional to 645,126.89, 890,224.67 and 358,629.53 is: 494,880.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,126.89 : 890,224.67 = 358,629.53 : x
  2. Step 2: Convert to fraction form
    645,126.89/890,224.67 = 358,629.53/x
  3. Step 3: Cross multiply
    645,126.89x = 890,224.67 × 358,629.53
  4. Step 4: Simplify right side
    645,126.89x = 319,260,851,441.96
  5. Step 5: Solve for x
    x = 319,260,851,441.96/645,126.89
  6. Step 6: Final answer
    x = 494,880.71

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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.