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Finding the Fourth Proportional to 645,326.73, 890,606.00 and 358,902.63

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Solution

The fourth proportional to 645,326.73, 890,606.00 and 358,902.63 is: 495,316.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,326.73 : 890,606.00 = 358,902.63 : x
  2. Step 2: Convert to fraction form
    645,326.73/890,606.00 = 358,902.63/x
  3. Step 3: Cross multiply
    645,326.73x = 890,606.00 × 358,902.63
  4. Step 4: Simplify right side
    645,326.73x = 319,640,836,591.04
  5. Step 5: Solve for x
    x = 319,640,836,591.04/645,326.73
  6. Step 6: Final answer
    x = 495,316.28

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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.