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Finding the Fourth Proportional to 287,717.20, 432,029.40 and 169,478.80

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Solution

The fourth proportional to 287,717.20, 432,029.40 and 169,478.80 is: 254,485.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,717.20 : 432,029.40 = 169,478.80 : x
  2. Step 2: Convert to fraction form
    287,717.20/432,029.40 = 169,478.80/x
  3. Step 3: Cross multiply
    287,717.20x = 432,029.40 × 169,478.80
  4. Step 4: Simplify right side
    287,717.20x = 73,219,824,276.72
  5. Step 5: Solve for x
    x = 73,219,824,276.72/287,717.20
  6. Step 6: Final answer
    x = 254,485.39

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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.