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Finding the Fourth Proportional to 478,492.71, 660,334.86 and 274,580.97

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Solution

The fourth proportional to 478,492.71, 660,334.86 and 274,580.97 is: 378,930.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,492.71 : 660,334.86 = 274,580.97 : x
  2. Step 2: Convert to fraction form
    478,492.71/660,334.86 = 274,580.97/x
  3. Step 3: Cross multiply
    478,492.71x = 660,334.86 × 274,580.97
  4. Step 4: Simplify right side
    478,492.71x = 181,315,386,383.61
  5. Step 5: Solve for x
    x = 181,315,386,383.61/478,492.71
  6. Step 6: Final answer
    x = 378,930.30

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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.