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Finding the Fourth Proportional to 1,188,962.01, 1,640,746.88 and 723,647.69

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Solution

The fourth proportional to 1,188,962.01, 1,640,746.88 and 723,647.69 is: 998,621.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,962.01 : 1,640,746.88 = 723,647.69 : x
  2. Step 2: Convert to fraction form
    1,188,962.01/1,640,746.88 = 723,647.69/x
  3. Step 3: Cross multiply
    1,188,962.01x = 1,640,746.88 × 723,647.69
  4. Step 4: Simplify right side
    1,188,962.01x = 1,187,322,689,586.71
  5. Step 5: Solve for x
    x = 1,187,322,689,586.71/1,188,962.01
  6. Step 6: Final answer
    x = 998,621.22

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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.