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Finding the Fourth Proportional to 911,137.82, 1,256,071.05 and 706,828.28

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Solution

The fourth proportional to 911,137.82, 1,256,071.05 and 706,828.28 is: 974,415.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,137.82 : 1,256,071.05 = 706,828.28 : x
  2. Step 2: Convert to fraction form
    911,137.82/1,256,071.05 = 706,828.28/x
  3. Step 3: Cross multiply
    911,137.82x = 1,256,071.05 × 706,828.28
  4. Step 4: Simplify right side
    911,137.82x = 887,826,533,548.94
  5. Step 5: Solve for x
    x = 887,826,533,548.94/911,137.82
  6. Step 6: Final answer
    x = 974,415.20

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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.