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Finding the Fourth Proportional to 662,688, 914,595.84 and 394,416

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Solution

The fourth proportional to 662,688, 914,595.84 and 394,416 is: 544,345.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,688 : 914,595.84 = 394,416 : x
  2. Step 2: Convert to fraction form
    662,688/914,595.84 = 394,416/x
  3. Step 3: Cross multiply
    662,688x = 914,595.84 × 394,416
  4. Step 4: Simplify right side
    662,688x = 360,731,232,829.44
  5. Step 5: Solve for x
    x = 360,731,232,829.44/662,688
  6. Step 6: Final answer
    x = 544,345.50

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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.