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Finding the Fourth Proportional to 486,064.60, 729,096.90 and 438,825.40

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Solution

The fourth proportional to 486,064.60, 729,096.90 and 438,825.40 is: 658,238.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,064.60 : 729,096.90 = 438,825.40 : x
  2. Step 2: Convert to fraction form
    486,064.60/729,096.90 = 438,825.40/x
  3. Step 3: Cross multiply
    486,064.60x = 729,096.90 × 438,825.40
  4. Step 4: Simplify right side
    486,064.60x = 319,946,238,781.26
  5. Step 5: Solve for x
    x = 319,946,238,781.26/486,064.60
  6. Step 6: Final answer
    x = 658,238.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.