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Finding the Fourth Proportional to 478,543.05, 660,365.55 and 263,648.43

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Solution

The fourth proportional to 478,543.05, 660,365.55 and 263,648.43 is: 363,821.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,543.05 : 660,365.55 = 263,648.43 : x
  2. Step 2: Convert to fraction form
    478,543.05/660,365.55 = 263,648.43/x
  3. Step 3: Cross multiply
    478,543.05x = 660,365.55 × 263,648.43
  4. Step 4: Simplify right side
    478,543.05x = 174,104,340,483.59
  5. Step 5: Solve for x
    x = 174,104,340,483.59/478,543.05
  6. Step 6: Final answer
    x = 363,821.69

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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.