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Finding the Fourth Proportional to 545,135.40, 818,577.90 and 368,425.80

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Solution

The fourth proportional to 545,135.40, 818,577.90 and 368,425.80 is: 553,229.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,135.40 : 818,577.90 = 368,425.80 : x
  2. Step 2: Convert to fraction form
    545,135.40/818,577.90 = 368,425.80/x
  3. Step 3: Cross multiply
    545,135.40x = 818,577.90 × 368,425.80
  4. Step 4: Simplify right side
    545,135.40x = 301,585,217,669.82
  5. Step 5: Solve for x
    x = 301,585,217,669.82/545,135.40
  6. Step 6: Final answer
    x = 553,229.93

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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.