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Finding the Fourth Proportional to 478,839.40, 660,798.42 and 274,903.54

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Solution

The fourth proportional to 478,839.40, 660,798.42 and 274,903.54 is: 379,366.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,839.40 : 660,798.42 = 274,903.54 : x
  2. Step 2: Convert to fraction form
    478,839.40/660,798.42 = 274,903.54/x
  3. Step 3: Cross multiply
    478,839.40x = 660,798.42 × 274,903.54
  4. Step 4: Simplify right side
    478,839.40x = 181,655,824,884.41
  5. Step 5: Solve for x
    x = 181,655,824,884.41/478,839.40
  6. Step 6: Final answer
    x = 379,366.91

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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.