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Finding the Fourth Proportional to 722,090.94, 996,516.65 and 399,801.05

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Solution

The fourth proportional to 722,090.94, 996,516.65 and 399,801.05 is: 551,742.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,090.94 : 996,516.65 = 399,801.05 : x
  2. Step 2: Convert to fraction form
    722,090.94/996,516.65 = 399,801.05/x
  3. Step 3: Cross multiply
    722,090.94x = 996,516.65 × 399,801.05
  4. Step 4: Simplify right side
    722,090.94x = 398,408,403,012.48
  5. Step 5: Solve for x
    x = 398,408,403,012.48/722,090.94
  6. Step 6: Final answer
    x = 551,742.70

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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.