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Finding the Fourth Proportional to 386,650.40, 579,908.80 and 102,342.88

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Solution

The fourth proportional to 386,650.40, 579,908.80 and 102,342.88 is: 153,496.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,650.40 : 579,908.80 = 102,342.88 : x
  2. Step 2: Convert to fraction form
    386,650.40/579,908.80 = 102,342.88/x
  3. Step 3: Cross multiply
    386,650.40x = 579,908.80 × 102,342.88
  4. Step 4: Simplify right side
    386,650.40x = 59,349,536,729.34
  5. Step 5: Solve for x
    x = 59,349,536,729.34/386,650.40
  6. Step 6: Final answer
    x = 153,496.64

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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.