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Finding the Fourth Proportional to 911,465.73, 1,367,364.65 and 312,487.47

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Solution

The fourth proportional to 911,465.73, 1,367,364.65 and 312,487.47 is: 468,788.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,465.73 : 1,367,364.65 = 312,487.47 : x
  2. Step 2: Convert to fraction form
    911,465.73/1,367,364.65 = 312,487.47/x
  3. Step 3: Cross multiply
    911,465.73x = 1,367,364.65 × 312,487.47
  4. Step 4: Simplify right side
    911,465.73x = 427,284,318,483.50
  5. Step 5: Solve for x
    x = 427,284,318,483.50/911,465.73
  6. Step 6: Final answer
    x = 468,788.13

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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.