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Finding the Fourth Proportional to 720,778.30, 994,509.09 and 430,333.46

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Solution

The fourth proportional to 720,778.30, 994,509.09 and 430,333.46 is: 593,761.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,778.30 : 994,509.09 = 430,333.46 : x
  2. Step 2: Convert to fraction form
    720,778.30/994,509.09 = 430,333.46/x
  3. Step 3: Cross multiply
    720,778.30x = 994,509.09 × 430,333.46
  4. Step 4: Simplify right side
    720,778.30x = 427,970,536,458.02
  5. Step 5: Solve for x
    x = 427,970,536,458.02/720,778.30
  6. Step 6: Final answer
    x = 593,761.69

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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.