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Finding the Fourth Proportional to 320,390.45, 480,658.67 and 170,551.79

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Solution

The fourth proportional to 320,390.45, 480,658.67 and 170,551.79 is: 255,866.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,390.45 : 480,658.67 = 170,551.79 : x
  2. Step 2: Convert to fraction form
    320,390.45/480,658.67 = 170,551.79/x
  3. Step 3: Cross multiply
    320,390.45x = 480,658.67 × 170,551.79
  4. Step 4: Simplify right side
    320,390.45x = 81,977,196,547.52
  5. Step 5: Solve for x
    x = 81,977,196,547.52/320,390.45
  6. Step 6: Final answer
    x = 255,866.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.