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Finding the Fourth Proportional to 613,688.80, 919,669.20 and 487,544.80

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Solution

The fourth proportional to 613,688.80, 919,669.20 and 487,544.80 is: 730,630.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,688.80 : 919,669.20 = 487,544.80 : x
  2. Step 2: Convert to fraction form
    613,688.80/919,669.20 = 487,544.80/x
  3. Step 3: Cross multiply
    613,688.80x = 919,669.20 × 487,544.80
  4. Step 4: Simplify right side
    613,688.80x = 448,379,936,180.16
  5. Step 5: Solve for x
    x = 448,379,936,180.16/613,688.80
  6. Step 6: Final answer
    x = 730,630.80

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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.