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Finding the Fourth Proportional to 287,112.53, 430,686.57 and 87,447.63

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Solution

The fourth proportional to 287,112.53, 430,686.57 and 87,447.63 is: 131,176.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,112.53 : 430,686.57 = 87,447.63 : x
  2. Step 2: Convert to fraction form
    287,112.53/430,686.57 = 87,447.63/x
  3. Step 3: Cross multiply
    287,112.53x = 430,686.57 × 87,447.63
  4. Step 4: Simplify right side
    287,112.53x = 37,662,520,677.43
  5. Step 5: Solve for x
    x = 37,662,520,677.43/287,112.53
  6. Step 6: Final answer
    x = 131,176.86

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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.