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Finding the Fourth Proportional to 722,165.42, 996,598.77 and 399,874.90

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Solution

The fourth proportional to 722,165.42, 996,598.77 and 399,874.90 is: 551,833.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,165.42 : 996,598.77 = 399,874.90 : x
  2. Step 2: Convert to fraction form
    722,165.42/996,598.77 = 399,874.90/x
  3. Step 3: Cross multiply
    722,165.42x = 996,598.77 × 399,874.90
  4. Step 4: Simplify right side
    722,165.42x = 398,514,833,493.87
  5. Step 5: Solve for x
    x = 398,514,833,493.87/722,165.42
  6. Step 6: Final answer
    x = 551,833.17

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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.