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Finding the Fourth Proportional to 478,915.32, 660,962.88 and 275,029.92

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Solution

The fourth proportional to 478,915.32, 660,962.88 and 275,029.92 is: 379,575.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,915.32 : 660,962.88 = 275,029.92 : x
  2. Step 2: Convert to fraction form
    478,915.32/660,962.88 = 275,029.92/x
  3. Step 3: Cross multiply
    478,915.32x = 660,962.88 × 275,029.92
  4. Step 4: Simplify right side
    478,915.32x = 181,784,568,009.37
  5. Step 5: Solve for x
    x = 181,784,568,009.37/478,915.32
  6. Step 6: Final answer
    x = 379,575.60

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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.