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Finding the Fourth Proportional to 287,289.25, 430,933.88 and 90,297.25

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Solution

The fourth proportional to 287,289.25, 430,933.88 and 90,297.25 is: 135,445.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,289.25 : 430,933.88 = 90,297.25 : x
  2. Step 2: Convert to fraction form
    287,289.25/430,933.88 = 90,297.25/x
  3. Step 3: Cross multiply
    287,289.25x = 430,933.88 × 90,297.25
  4. Step 4: Simplify right side
    287,289.25x = 38,912,144,295.83
  5. Step 5: Solve for x
    x = 38,912,144,295.83/287,289.25
  6. Step 6: Final answer
    x = 135,445.88

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1.5x scale

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.