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Finding the Fourth Proportional to 354,939.40, 532,409.10 and 105,621.40

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Solution

The fourth proportional to 354,939.40, 532,409.10 and 105,621.40 is: 158,432.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,939.40 : 532,409.10 = 105,621.40 : x
  2. Step 2: Convert to fraction form
    354,939.40/532,409.10 = 105,621.40/x
  3. Step 3: Cross multiply
    354,939.40x = 532,409.10 × 105,621.40
  4. Step 4: Simplify right side
    354,939.40x = 56,233,794,514.74
  5. Step 5: Solve for x
    x = 56,233,794,514.74/354,939.40
  6. Step 6: Final answer
    x = 158,432.10

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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.