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Finding the Fourth Proportional to 546,545.30, 821,567.55 and 389,858.90

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Solution

The fourth proportional to 546,545.30, 821,567.55 and 389,858.90 is: 586,036.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    546,545.30 : 821,567.55 = 389,858.90 : x
  2. Step 2: Convert to fraction form
    546,545.30/821,567.55 = 389,858.90/x
  3. Step 3: Cross multiply
    546,545.30x = 821,567.55 × 389,858.90
  4. Step 4: Simplify right side
    546,545.30x = 320,295,421,318.70
  5. Step 5: Solve for x
    x = 320,295,421,318.70/546,545.30
  6. Step 6: Final answer
    x = 586,036.37

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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.