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Finding the Fourth Proportional to 478,780.61, 660,721.68 and 263,928.38

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Solution

The fourth proportional to 478,780.61, 660,721.68 and 263,928.38 is: 364,223.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,780.61 : 660,721.68 = 263,928.38 : x
  2. Step 2: Convert to fraction form
    478,780.61/660,721.68 = 263,928.38/x
  3. Step 3: Cross multiply
    478,780.61x = 660,721.68 × 263,928.38
  4. Step 4: Simplify right side
    478,780.61x = 174,383,199,329.67
  5. Step 5: Solve for x
    x = 174,383,199,329.67/478,780.61
  6. Step 6: Final answer
    x = 364,223.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.