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Finding the Fourth Proportional to 389,445.47, 536,636.34 and 287,308.92

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Solution

The fourth proportional to 389,445.47, 536,636.34 and 287,308.92 is: 395,897.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,445.47 : 536,636.34 = 287,308.92 : x
  2. Step 2: Convert to fraction form
    389,445.47/536,636.34 = 287,308.92/x
  3. Step 3: Cross multiply
    389,445.47x = 536,636.34 × 287,308.92
  4. Step 4: Simplify right side
    389,445.47x = 154,180,409,290.54
  5. Step 5: Solve for x
    x = 154,180,409,290.54/389,445.47
  6. Step 6: Final answer
    x = 395,897.30

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1.5x scale

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.