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Finding the Fourth Proportional to 722,178.45, 996,594.10 and 399,881.63

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Solution

The fourth proportional to 722,178.45, 996,594.10 and 399,881.63 is: 551,829.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,178.45 : 996,594.10 = 399,881.63 : x
  2. Step 2: Convert to fraction form
    722,178.45/996,594.10 = 399,881.63/x
  3. Step 3: Cross multiply
    722,178.45x = 996,594.10 × 399,881.63
  4. Step 4: Simplify right side
    722,178.45x = 398,519,674,648.16
  5. Step 5: Solve for x
    x = 398,519,674,648.16/722,178.45
  6. Step 6: Final answer
    x = 551,829.92

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Double scale
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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.