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Finding the Fourth Proportional to 613,612.80, 919,555.20 and 487,468.80

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Solution

The fourth proportional to 613,612.80, 919,555.20 and 487,468.80 is: 730,516.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,612.80 : 919,555.20 = 487,468.80 : x
  2. Step 2: Convert to fraction form
    613,612.80/919,555.20 = 487,468.80/x
  3. Step 3: Cross multiply
    613,612.80x = 919,555.20 × 487,468.80
  4. Step 4: Simplify right side
    613,612.80x = 448,254,469,877.76
  5. Step 5: Solve for x
    x = 448,254,469,877.76/613,612.80
  6. Step 6: Final answer
    x = 730,516.82

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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.