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Finding the Fourth Proportional to 386,354.28, 579,525.20 and 105,871.52

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Solution

The fourth proportional to 386,354.28, 579,525.20 and 105,871.52 is: 158,805.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,354.28 : 579,525.20 = 105,871.52 : x
  2. Step 2: Convert to fraction form
    386,354.28/579,525.20 = 105,871.52/x
  3. Step 3: Cross multiply
    386,354.28x = 579,525.20 × 105,871.52
  4. Step 4: Simplify right side
    386,354.28x = 61,355,213,802.30
  5. Step 5: Solve for x
    x = 61,355,213,802.30/386,354.28
  6. Step 6: Final answer
    x = 158,805.58

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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.