Home / 645,122.88-890,228.07-358,635.60

Finding the Fourth Proportional to 645,122.88, 890,228.07 and 358,635.60

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Solution

The fourth proportional to 645,122.88, 890,228.07 and 358,635.60 is: 494,894.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,122.88 : 890,228.07 = 358,635.60 : x
  2. Step 2: Convert to fraction form
    645,122.88/890,228.07 = 358,635.60/x
  3. Step 3: Cross multiply
    645,122.88x = 890,228.07 × 358,635.60
  4. Step 4: Simplify right side
    645,122.88x = 319,267,478,021.29
  5. Step 5: Solve for x
    x = 319,267,478,021.29/645,122.88
  6. Step 6: Final answer
    x = 494,894.05

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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.