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Finding the Fourth Proportional to 478,491.18, 660,332.80 and 274,579.44

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Solution

The fourth proportional to 478,491.18, 660,332.80 and 274,579.44 is: 378,928.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,491.18 : 660,332.80 = 274,579.44 : x
  2. Step 2: Convert to fraction form
    478,491.18/660,332.80 = 274,579.44/x
  3. Step 3: Cross multiply
    478,491.18x = 660,332.80 × 274,579.44
  4. Step 4: Simplify right side
    478,491.18x = 181,313,810,437.63
  5. Step 5: Solve for x
    x = 181,313,810,437.63/478,491.18
  6. Step 6: Final answer
    x = 378,928.22

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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.