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Finding the Fourth Proportional to 645,959.07, 890,499.69 and 454,377.87

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Solution

The fourth proportional to 645,959.07, 890,499.69 and 454,377.87 is: 626,391.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,959.07 : 890,499.69 = 454,377.87 : x
  2. Step 2: Convert to fraction form
    645,959.07/890,499.69 = 454,377.87/x
  3. Step 3: Cross multiply
    645,959.07x = 890,499.69 × 454,377.87
  4. Step 4: Simplify right side
    645,959.07x = 404,623,352,377.86
  5. Step 5: Solve for x
    x = 404,623,352,377.86/645,959.07
  6. Step 6: Final answer
    x = 626,391.63

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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.