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Finding the Fourth Proportional to 911,886.05, 1,367,856.73 and 312,838.53

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Solution

The fourth proportional to 911,886.05, 1,367,856.73 and 312,838.53 is: 469,267.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,886.05 : 1,367,856.73 = 312,838.53 : x
  2. Step 2: Convert to fraction form
    911,886.05/1,367,856.73 = 312,838.53/x
  3. Step 3: Cross multiply
    911,886.05x = 1,367,856.73 × 312,838.53
  4. Step 4: Simplify right side
    911,886.05x = 427,918,288,663.81
  5. Step 5: Solve for x
    x = 427,918,288,663.81/911,886.05
  6. Step 6: Final answer
    x = 469,267.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.