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Finding the Fourth Proportional to 399,632.40, 599,788.80 and 163,144.80

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Solution

The fourth proportional to 399,632.40, 599,788.80 and 163,144.80 is: 244,856.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,632.40 : 599,788.80 = 163,144.80 : x
  2. Step 2: Convert to fraction form
    399,632.40/599,788.80 = 163,144.80/x
  3. Step 3: Cross multiply
    399,632.40x = 599,788.80 × 163,144.80
  4. Step 4: Simplify right side
    399,632.40x = 97,852,423,818.24
  5. Step 5: Solve for x
    x = 97,852,423,818.24/399,632.40
  6. Step 6: Final answer
    x = 244,856.08

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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.