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Finding the Fourth Proportional to 645,534.66, 890,835.47 and 359,054.78

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Solution

The fourth proportional to 645,534.66, 890,835.47 and 359,054.78 is: 495,494.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,534.66 : 890,835.47 = 359,054.78 : x
  2. Step 2: Convert to fraction form
    645,534.66/890,835.47 = 359,054.78/x
  3. Step 3: Cross multiply
    645,534.66x = 890,835.47 × 359,054.78
  4. Step 4: Simplify right side
    645,534.66x = 319,858,728,794.05
  5. Step 5: Solve for x
    x = 319,858,728,794.05/645,534.66
  6. Step 6: Final answer
    x = 495,494.27

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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.