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Finding the Fourth Proportional to 287,011.68, 430,518.48 and 87,333.60

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Solution

The fourth proportional to 287,011.68, 430,518.48 and 87,333.60 is: 131,000.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,011.68 : 430,518.48 = 87,333.60 : x
  2. Step 2: Convert to fraction form
    287,011.68/430,518.48 = 87,333.60/x
  3. Step 3: Cross multiply
    287,011.68x = 430,518.48 × 87,333.60
  4. Step 4: Simplify right side
    287,011.68x = 37,598,728,724.93
  5. Step 5: Solve for x
    x = 37,598,728,724.93/287,011.68
  6. Step 6: Final answer
    x = 131,000.69

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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.