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Finding the Fourth Proportional to 478,494.21, 660,336.93 and 274,582.47

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Solution

The fourth proportional to 478,494.21, 660,336.93 and 274,582.47 is: 378,932.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,494.21 : 660,336.93 = 274,582.47 : x
  2. Step 2: Convert to fraction form
    478,494.21/660,336.93 = 274,582.47/x
  3. Step 3: Cross multiply
    478,494.21x = 660,336.93 × 274,582.47
  4. Step 4: Simplify right side
    478,494.21x = 181,316,945,271.62
  5. Step 5: Solve for x
    x = 181,316,945,271.62/478,494.21
  6. Step 6: Final answer
    x = 378,932.37

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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.