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Finding the Fourth Proportional to 478,491.21, 660,332.79 and 274,579.47

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Solution

The fourth proportional to 478,491.21, 660,332.79 and 274,579.47 is: 378,928.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,491.21 : 660,332.79 = 274,579.47 : x
  2. Step 2: Convert to fraction form
    478,491.21/660,332.79 = 274,579.47/x
  3. Step 3: Cross multiply
    478,491.21x = 660,332.79 × 274,579.47
  4. Step 4: Simplify right side
    478,491.21x = 181,313,827,501.82
  5. Step 5: Solve for x
    x = 181,313,827,501.82/478,491.21
  6. Step 6: Final answer
    x = 378,928.23

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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.