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Finding the Fourth Proportional to 911,908.35, 1,258,394.34 and 503,989.11

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Solution

The fourth proportional to 911,908.35, 1,258,394.34 and 503,989.11 is: 695,483.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,908.35 : 1,258,394.34 = 503,989.11 : x
  2. Step 2: Convert to fraction form
    911,908.35/1,258,394.34 = 503,989.11/x
  3. Step 3: Cross multiply
    911,908.35x = 1,258,394.34 × 503,989.11
  4. Step 4: Simplify right side
    911,908.35x = 634,217,043,445.64
  5. Step 5: Solve for x
    x = 634,217,043,445.64/911,908.35
  6. Step 6: Final answer
    x = 695,483.32

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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.