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Finding the Fourth Proportional to 478,345.45, 660,094.85 and 274,383.54

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Solution

The fourth proportional to 478,345.45, 660,094.85 and 274,383.54 is: 378,636.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,345.45 : 660,094.85 = 274,383.54 : x
  2. Step 2: Convert to fraction form
    478,345.45/660,094.85 = 274,383.54/x
  3. Step 3: Cross multiply
    478,345.45x = 660,094.85 × 274,383.54
  4. Step 4: Simplify right side
    478,345.45x = 181,119,161,678.77
  5. Step 5: Solve for x
    x = 181,119,161,678.77/478,345.45
  6. Step 6: Final answer
    x = 378,636.74

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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.