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Finding the Fourth Proportional to 645,487.66, 890,804.55 and 359,001.64

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Solution

The fourth proportional to 645,487.66, 890,804.55 and 359,001.64 is: 495,439.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,487.66 : 890,804.55 = 359,001.64 : x
  2. Step 2: Convert to fraction form
    645,487.66/890,804.55 = 359,001.64/x
  3. Step 3: Cross multiply
    645,487.66x = 890,804.55 × 359,001.64
  4. Step 4: Simplify right side
    645,487.66x = 319,800,294,369.46
  5. Step 5: Solve for x
    x = 319,800,294,369.46/645,487.66
  6. Step 6: Final answer
    x = 495,439.83

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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.