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Finding the Fourth Proportional to 287,712.20, 432,021.90 and 169,473.80

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Solution

The fourth proportional to 287,712.20, 432,021.90 and 169,473.80 is: 254,477.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,712.20 : 432,021.90 = 169,473.80 : x
  2. Step 2: Convert to fraction form
    287,712.20/432,021.90 = 169,473.80/x
  3. Step 3: Cross multiply
    287,712.20x = 432,021.90 × 169,473.80
  4. Step 4: Simplify right side
    287,712.20x = 73,216,393,076.22
  5. Step 5: Solve for x
    x = 73,216,393,076.22/287,712.20
  6. Step 6: Final answer
    x = 254,477.89

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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.