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Finding the Fourth Proportional to 770,576.80, 1,155,404.40 and 397,328.80

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Solution

The fourth proportional to 770,576.80, 1,155,404.40 and 397,328.80 is: 595,755.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    770,576.80 : 1,155,404.40 = 397,328.80 : x
  2. Step 2: Convert to fraction form
    770,576.80/1,155,404.40 = 397,328.80/x
  3. Step 3: Cross multiply
    770,576.80x = 1,155,404.40 × 397,328.80
  4. Step 4: Simplify right side
    770,576.80x = 459,075,443,766.72
  5. Step 5: Solve for x
    x = 459,075,443,766.72/770,576.80
  6. Step 6: Final answer
    x = 595,755.60

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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.