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Finding the Fourth Proportional to 478,631.16, 660,513.60 and 274,665.84

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Solution

The fourth proportional to 478,631.16, 660,513.60 and 274,665.84 is: 379,040.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,631.16 : 660,513.60 = 274,665.84 : x
  2. Step 2: Convert to fraction form
    478,631.16/660,513.60 = 274,665.84/x
  3. Step 3: Cross multiply
    478,631.16x = 660,513.60 × 274,665.84
  4. Step 4: Simplify right side
    478,631.16x = 181,420,522,775.42
  5. Step 5: Solve for x
    x = 181,420,522,775.42/478,631.16
  6. Step 6: Final answer
    x = 379,040.35

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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.