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Finding the Fourth Proportional to 287,522.21, 396,783.34 and 158,465.42

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Solution

The fourth proportional to 287,522.21, 396,783.34 and 158,465.42 is: 218,683.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,522.21 : 396,783.34 = 158,465.42 : x
  2. Step 2: Convert to fraction form
    287,522.21/396,783.34 = 158,465.42/x
  3. Step 3: Cross multiply
    287,522.21x = 396,783.34 × 158,465.42
  4. Step 4: Simplify right side
    287,522.21x = 62,876,436,242.02
  5. Step 5: Solve for x
    x = 62,876,436,242.02/287,522.21
  6. Step 6: Final answer
    x = 218,683.75

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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.