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Finding the Fourth Proportional to 287,560.20, 431,340.30 and 130,096.20

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Solution

The fourth proportional to 287,560.20, 431,340.30 and 130,096.20 is: 195,144.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,560.20 : 431,340.30 = 130,096.20 : x
  2. Step 2: Convert to fraction form
    287,560.20/431,340.30 = 130,096.20/x
  3. Step 3: Cross multiply
    287,560.20x = 431,340.30 × 130,096.20
  4. Step 4: Simplify right side
    287,560.20x = 56,115,733,936.86
  5. Step 5: Solve for x
    x = 56,115,733,936.86/287,560.20
  6. Step 6: Final answer
    x = 195,144.30

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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.