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Finding the Fourth Proportional to 478,828.65, 660,790.86 and 261,037.47

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Solution

The fourth proportional to 478,828.65, 660,790.86 and 261,037.47 is: 360,235.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,828.65 : 660,790.86 = 261,037.47 : x
  2. Step 2: Convert to fraction form
    478,828.65/660,790.86 = 261,037.47/x
  3. Step 3: Cross multiply
    478,828.65x = 660,790.86 × 261,037.47
  4. Step 4: Simplify right side
    478,828.65x = 172,491,174,293.52
  5. Step 5: Solve for x
    x = 172,491,174,293.52/478,828.65
  6. Step 6: Final answer
    x = 360,235.70

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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.