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Finding the Fourth Proportional to 285,564.17, 428,347.28 and 72,331.99

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Solution

The fourth proportional to 285,564.17, 428,347.28 and 72,331.99 is: 108,498.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,564.17 : 428,347.28 = 72,331.99 : x
  2. Step 2: Convert to fraction form
    285,564.17/428,347.28 = 72,331.99/x
  3. Step 3: Cross multiply
    285,564.17x = 428,347.28 × 72,331.99
  4. Step 4: Simplify right side
    285,564.17x = 30,983,210,283.45
  5. Step 5: Solve for x
    x = 30,983,210,283.45/285,564.17
  6. Step 6: Final answer
    x = 108,498.24

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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.