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Finding the Fourth Proportional to 495,428.40, 743,142.60 and 258,843.60

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Solution

The fourth proportional to 495,428.40, 743,142.60 and 258,843.60 is: 388,265.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,428.40 : 743,142.60 = 258,843.60 : x
  2. Step 2: Convert to fraction form
    495,428.40/743,142.60 = 258,843.60/x
  3. Step 3: Cross multiply
    495,428.40x = 743,142.60 × 258,843.60
  4. Step 4: Simplify right side
    495,428.40x = 192,357,705,897.36
  5. Step 5: Solve for x
    x = 192,357,705,897.36/495,428.40
  6. Step 6: Final answer
    x = 388,265.40

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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.