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Finding the Fourth Proportional to 478,987.62, 718,272.78 and 137,355.66

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Solution

The fourth proportional to 478,987.62, 718,272.78 and 137,355.66 is: 205,973.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,987.62 : 718,272.78 = 137,355.66 : x
  2. Step 2: Convert to fraction form
    478,987.62/718,272.78 = 137,355.66/x
  3. Step 3: Cross multiply
    478,987.62x = 718,272.78 × 137,355.66
  4. Step 4: Simplify right side
    478,987.62x = 98,658,831,756.93
  5. Step 5: Solve for x
    x = 98,658,831,756.93/478,987.62
  6. Step 6: Final answer
    x = 205,973.66

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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.