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Finding the Fourth Proportional to 1,388,196.90, 2,079,342.90 and 1,152,000.90

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Solution

The fourth proportional to 1,388,196.90, 2,079,342.90 and 1,152,000.90 is: 1,725,551.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,196.90 : 2,079,342.90 = 1,152,000.90 : x
  2. Step 2: Convert to fraction form
    1,388,196.90/2,079,342.90 = 1,152,000.90/x
  3. Step 3: Cross multiply
    1,388,196.90x = 2,079,342.90 × 1,152,000.90
  4. Step 4: Simplify right side
    1,388,196.90x = 2,395,404,892,208.61
  5. Step 5: Solve for x
    x = 2,395,404,892,208.61/1,388,196.90
  6. Step 6: Final answer
    x = 1,725,551.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.