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Finding the Fourth Proportional to 483,939.40, 725,909.10 and 421,731.40

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Solution

The fourth proportional to 483,939.40, 725,909.10 and 421,731.40 is: 632,597.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,939.40 : 725,909.10 = 421,731.40 : x
  2. Step 2: Convert to fraction form
    483,939.40/725,909.10 = 421,731.40/x
  3. Step 3: Cross multiply
    483,939.40x = 725,909.10 × 421,731.40
  4. Step 4: Simplify right side
    483,939.40x = 306,138,661,015.74
  5. Step 5: Solve for x
    x = 306,138,661,015.74/483,939.40
  6. Step 6: Final answer
    x = 632,597.10

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1.5x scale

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.