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Finding the Fourth Proportional to 287,145.90, 430,810.65 and 87,504.30

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Solution

The fourth proportional to 287,145.90, 430,810.65 and 87,504.30 is: 131,284.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,145.90 : 430,810.65 = 87,504.30 : x
  2. Step 2: Convert to fraction form
    287,145.90/430,810.65 = 87,504.30/x
  3. Step 3: Cross multiply
    287,145.90x = 430,810.65 × 87,504.30
  4. Step 4: Simplify right side
    287,145.90x = 37,697,784,360.80
  5. Step 5: Solve for x
    x = 37,697,784,360.80/287,145.90
  6. Step 6: Final answer
    x = 131,284.42

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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.