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Finding the Fourth Proportional to 627,136, 865,456.98 and 355,197.12

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Solution

The fourth proportional to 627,136, 865,456.98 and 355,197.12 is: 490,177.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,136 : 865,456.98 = 355,197.12 : x
  2. Step 2: Convert to fraction form
    627,136/865,456.98 = 355,197.12/x
  3. Step 3: Cross multiply
    627,136x = 865,456.98 × 355,197.12
  4. Step 4: Simplify right side
    627,136x = 307,407,826,779.90
  5. Step 5: Solve for x
    x = 307,407,826,779.90/627,136
  6. Step 6: Final answer
    x = 490,177.29

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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.