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Finding the Fourth Proportional to 478,563.90, 717,859.77 and 178,987.32

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Solution

The fourth proportional to 478,563.90, 717,859.77 and 178,987.32 is: 268,486.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,563.90 : 717,859.77 = 178,987.32 : x
  2. Step 2: Convert to fraction form
    478,563.90/717,859.77 = 178,987.32/x
  3. Step 3: Cross multiply
    478,563.90x = 717,859.77 × 178,987.32
  4. Step 4: Simplify right side
    478,563.90x = 128,487,795,696.91
  5. Step 5: Solve for x
    x = 128,487,795,696.91/478,563.90
  6. Step 6: Final answer
    x = 268,486.19

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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.