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Finding the Fourth Proportional to 287,029.80, 430,544.70 and 87,332.40

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Solution

The fourth proportional to 287,029.80, 430,544.70 and 87,332.40 is: 130,998.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,029.80 : 430,544.70 = 87,332.40 : x
  2. Step 2: Convert to fraction form
    287,029.80/430,544.70 = 87,332.40/x
  3. Step 3: Cross multiply
    287,029.80x = 430,544.70 × 87,332.40
  4. Step 4: Simplify right side
    287,029.80x = 37,600,501,958.28
  5. Step 5: Solve for x
    x = 37,600,501,958.28/287,029.80
  6. Step 6: Final answer
    x = 130,998.60

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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.