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Finding the Fourth Proportional to 287,745.50, 431,793.22 and 121,533.50

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Solution

The fourth proportional to 287,745.50, 431,793.22 and 121,533.50 is: 182,374.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,745.50 : 431,793.22 = 121,533.50 : x
  2. Step 2: Convert to fraction form
    287,745.50/431,793.22 = 121,533.50/x
  3. Step 3: Cross multiply
    287,745.50x = 431,793.22 × 121,533.50
  4. Step 4: Simplify right side
    287,745.50x = 52,477,341,302.87
  5. Step 5: Solve for x
    x = 52,477,341,302.87/287,745.50
  6. Step 6: Final answer
    x = 182,374.15

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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.