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Finding the Fourth Proportional to 645,469.66, 890,779.67 and 358,983.60

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Solution

The fourth proportional to 645,469.66, 890,779.67 and 358,983.60 is: 495,414.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,469.66 : 890,779.67 = 358,983.60 : x
  2. Step 2: Convert to fraction form
    645,469.66/890,779.67 = 358,983.60/x
  3. Step 3: Cross multiply
    645,469.66x = 890,779.67 × 358,983.60
  4. Step 4: Simplify right side
    645,469.66x = 319,775,292,743.41
  5. Step 5: Solve for x
    x = 319,775,292,743.41/645,469.66
  6. Step 6: Final answer
    x = 495,414.91

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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.