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Finding the Fourth Proportional to 722,963.21, 997,689.21 and 400,721.72

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Solution

The fourth proportional to 722,963.21, 997,689.21 and 400,721.72 is: 552,995.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,963.21 : 997,689.21 = 400,721.72 : x
  2. Step 2: Convert to fraction form
    722,963.21/997,689.21 = 400,721.72/x
  3. Step 3: Cross multiply
    722,963.21x = 997,689.21 × 400,721.72
  4. Step 4: Simplify right side
    722,963.21x = 399,795,736,256.64
  5. Step 5: Solve for x
    x = 399,795,736,256.64/722,963.21
  6. Step 6: Final answer
    x = 552,995.96

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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.