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Finding the Fourth Proportional to 722,807.44, 997,496.13 and 400,487.38

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Solution

The fourth proportional to 722,807.44, 997,496.13 and 400,487.38 is: 552,684.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,807.44 : 997,496.13 = 400,487.38 : x
  2. Step 2: Convert to fraction form
    722,807.44/997,496.13 = 400,487.38/x
  3. Step 3: Cross multiply
    722,807.44x = 997,496.13 × 400,487.38
  4. Step 4: Simplify right side
    722,807.44x = 399,484,610,671.93
  5. Step 5: Solve for x
    x = 399,484,610,671.93/722,807.44
  6. Step 6: Final answer
    x = 552,684.70

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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.