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Finding the Fourth Proportional to 720,436.75, 994,205.76 and 393,756.35

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Solution

The fourth proportional to 720,436.75, 994,205.76 and 393,756.35 is: 543,385.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,436.75 : 994,205.76 = 393,756.35 : x
  2. Step 2: Convert to fraction form
    720,436.75/994,205.76 = 393,756.35/x
  3. Step 3: Cross multiply
    720,436.75x = 994,205.76 × 393,756.35
  4. Step 4: Simplify right side
    720,436.75x = 391,474,831,206.58
  5. Step 5: Solve for x
    x = 391,474,831,206.58/720,436.75
  6. Step 6: Final answer
    x = 543,385.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.