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Finding the Fourth Proportional to 770,580.80, 1,155,410.40 and 397,332.80

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Solution

The fourth proportional to 770,580.80, 1,155,410.40 and 397,332.80 is: 595,761.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    770,580.80 : 1,155,410.40 = 397,332.80 : x
  2. Step 2: Convert to fraction form
    770,580.80/1,155,410.40 = 397,332.80/x
  3. Step 3: Cross multiply
    770,580.80x = 1,155,410.40 × 397,332.80
  4. Step 4: Simplify right side
    770,580.80x = 459,082,449,381.12
  5. Step 5: Solve for x
    x = 459,082,449,381.12/770,580.80
  6. Step 6: Final answer
    x = 595,761.60

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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.