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Finding the Fourth Proportional to 478,355.86, 660,159.44 and 274,405.28

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Solution

The fourth proportional to 478,355.86, 660,159.44 and 274,405.28 is: 378,695.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,355.86 : 660,159.44 = 274,405.28 : x
  2. Step 2: Convert to fraction form
    478,355.86/660,159.44 = 274,405.28/x
  3. Step 3: Cross multiply
    478,355.86x = 660,159.44 × 274,405.28
  4. Step 4: Simplify right side
    478,355.86x = 181,151,235,977.84
  5. Step 5: Solve for x
    x = 181,151,235,977.84/478,355.86
  6. Step 6: Final answer
    x = 378,695.55

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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.