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Finding the Fourth Proportional to 911,969.05, 1,258,495.34 and 498,487.27

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Solution

The fourth proportional to 911,969.05, 1,258,495.34 and 498,487.27 is: 687,900.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,969.05 : 1,258,495.34 = 498,487.27 : x
  2. Step 2: Convert to fraction form
    911,969.05/1,258,495.34 = 498,487.27/x
  3. Step 3: Cross multiply
    911,969.05x = 1,258,495.34 × 498,487.27
  4. Step 4: Simplify right side
    911,969.05x = 627,343,906,344.32
  5. Step 5: Solve for x
    x = 627,343,906,344.32/911,969.05
  6. Step 6: Final answer
    x = 687,900.44

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1.5x scale

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.