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Finding the Fourth Proportional to 478,518.98, 660,371.14 and 274,607.20

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Solution

The fourth proportional to 478,518.98, 660,371.14 and 274,607.20 is: 378,966.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,518.98 : 660,371.14 = 274,607.20 : x
  2. Step 2: Convert to fraction form
    478,518.98/660,371.14 = 274,607.20/x
  3. Step 3: Cross multiply
    478,518.98x = 660,371.14 × 274,607.20
  4. Step 4: Simplify right side
    478,518.98x = 181,342,669,716.21
  5. Step 5: Solve for x
    x = 181,342,669,716.21/478,518.98
  6. Step 6: Final answer
    x = 378,966.51

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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.