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Finding the Fourth Proportional to 722,715.64, 997,334.64 and 400,419.28

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Solution

The fourth proportional to 722,715.64, 997,334.64 and 400,419.28 is: 552,571.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,715.64 : 997,334.64 = 400,419.28 : x
  2. Step 2: Convert to fraction form
    722,715.64/997,334.64 = 400,419.28/x
  3. Step 3: Cross multiply
    722,715.64x = 997,334.64 × 400,419.28
  4. Step 4: Simplify right side
    722,715.64x = 399,352,018,467.86
  5. Step 5: Solve for x
    x = 399,352,018,467.86/722,715.64
  6. Step 6: Final answer
    x = 552,571.44

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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.