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Finding the Fourth Proportional to 478,543.78, 660,419.94 and 263,683.84

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Solution

The fourth proportional to 478,543.78, 660,419.94 and 263,683.84 is: 363,899.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,543.78 : 660,419.94 = 263,683.84 : x
  2. Step 2: Convert to fraction form
    478,543.78/660,419.94 = 263,683.84/x
  3. Step 3: Cross multiply
    478,543.78x = 660,419.94 × 263,683.84
  4. Step 4: Simplify right side
    478,543.78x = 174,142,065,791.77
  5. Step 5: Solve for x
    x = 174,142,065,791.77/478,543.78
  6. Step 6: Final answer
    x = 363,899.97

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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.