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Finding the Fourth Proportional to 478,840.98, 660,860.37 and 274,955.70

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Solution

The fourth proportional to 478,840.98, 660,860.37 and 274,955.70 is: 379,473.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,840.98 : 660,860.37 = 274,955.70 : x
  2. Step 2: Convert to fraction form
    478,840.98/660,860.37 = 274,955.70/x
  3. Step 3: Cross multiply
    478,840.98x = 660,860.37 × 274,955.70
  4. Step 4: Simplify right side
    478,840.98x = 181,707,325,635.61
  5. Step 5: Solve for x
    x = 181,707,325,635.61/478,840.98
  6. Step 6: Final answer
    x = 379,473.21

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1.5x scale

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.