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Finding the Fourth Proportional to 911,434.53, 1,258,133.94 and 815,775.15

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Solution

The fourth proportional to 911,434.53, 1,258,133.94 and 815,775.15 is: 1,126,086.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,434.53 : 1,258,133.94 = 815,775.15 : x
  2. Step 2: Convert to fraction form
    911,434.53/1,258,133.94 = 815,775.15/x
  3. Step 3: Cross multiply
    911,434.53x = 1,258,133.94 × 815,775.15
  4. Step 4: Simplify right side
    911,434.53x = 1,026,354,403,558.96
  5. Step 5: Solve for x
    x = 1,026,354,403,558.96/911,434.53
  6. Step 6: Final answer
    x = 1,126,086.81

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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.