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Finding the Fourth Proportional to 786,612.80, 1,179,688.80 and 365,787.20

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Solution

The fourth proportional to 786,612.80, 1,179,688.80 and 365,787.20 is: 548,573.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,612.80 : 1,179,688.80 = 365,787.20 : x
  2. Step 2: Convert to fraction form
    786,612.80/1,179,688.80 = 365,787.20/x
  3. Step 3: Cross multiply
    786,612.80x = 1,179,688.80 × 365,787.20
  4. Step 4: Simplify right side
    786,612.80x = 431,515,063,023.36
  5. Step 5: Solve for x
    x = 431,515,063,023.36/786,612.80
  6. Step 6: Final answer
    x = 548,573.66

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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.