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Finding the Fourth Proportional to 911,622.72, 1,256,538.98 and 646,496.80

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Solution

The fourth proportional to 911,622.72, 1,256,538.98 and 646,496.80 is: 891,101.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,622.72 : 1,256,538.98 = 646,496.80 : x
  2. Step 2: Convert to fraction form
    911,622.72/1,256,538.98 = 646,496.80/x
  3. Step 3: Cross multiply
    911,622.72x = 1,256,538.98 × 646,496.80
  4. Step 4: Simplify right side
    911,622.72x = 812,348,429,645.26
  5. Step 5: Solve for x
    x = 812,348,429,645.26/911,622.72
  6. Step 6: Final answer
    x = 891,101.56

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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.