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Finding the Fourth Proportional to 722,015.70, 996,389.43 and 399,730.74

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Solution

The fourth proportional to 722,015.70, 996,389.43 and 399,730.74 is: 551,632.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,015.70 : 996,389.43 = 399,730.74 : x
  2. Step 2: Convert to fraction form
    722,015.70/996,389.43 = 399,730.74/x
  3. Step 3: Cross multiply
    722,015.70x = 996,389.43 × 399,730.74
  4. Step 4: Simplify right side
    722,015.70x = 398,287,484,182.08
  5. Step 5: Solve for x
    x = 398,287,484,182.08/722,015.70
  6. Step 6: Final answer
    x = 551,632.72

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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.