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Finding the Fourth Proportional to 722,970.24, 997,698.84 and 400,728.72

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Solution

The fourth proportional to 722,970.24, 997,698.84 and 400,728.72 is: 553,005.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,970.24 : 997,698.84 = 400,728.72 : x
  2. Step 2: Convert to fraction form
    722,970.24/997,698.84 = 400,728.72/x
  3. Step 3: Cross multiply
    722,970.24x = 997,698.84 × 400,728.72
  4. Step 4: Simplify right side
    722,970.24x = 399,806,579,098.69
  5. Step 5: Solve for x
    x = 399,806,579,098.69/722,970.24
  6. Step 6: Final answer
    x = 553,005.58

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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.