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Finding the Fourth Proportional to 722,210.10, 996,649.30 and 399,920.20

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Solution

The fourth proportional to 722,210.10, 996,649.30 and 399,920.20 is: 551,889.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,210.10 : 996,649.30 = 399,920.20 : x
  2. Step 2: Convert to fraction form
    722,210.10/996,649.30 = 399,920.20/x
  3. Step 3: Cross multiply
    722,210.10x = 996,649.30 × 399,920.20
  4. Step 4: Simplify right side
    722,210.10x = 398,580,187,385.86
  5. Step 5: Solve for x
    x = 398,580,187,385.86/722,210.10
  6. Step 6: Final answer
    x = 551,889.52

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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.