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Finding the Fourth Proportional to 545,593.80, 820,140.30 and 388,907.40

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Solution

The fourth proportional to 545,593.80, 820,140.30 and 388,907.40 is: 584,608.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,593.80 : 820,140.30 = 388,907.40 : x
  2. Step 2: Convert to fraction form
    545,593.80/820,140.30 = 388,907.40/x
  3. Step 3: Cross multiply
    545,593.80x = 820,140.30 × 388,907.40
  4. Step 4: Simplify right side
    545,593.80x = 318,958,631,708.22
  5. Step 5: Solve for x
    x = 318,958,631,708.22/545,593.80
  6. Step 6: Final answer
    x = 584,608.24

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1.5x scale

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.