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Finding the Fourth Proportional to 320,010.80, 480,016.20 and 315,345.20

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Solution

The fourth proportional to 320,010.80, 480,016.20 and 315,345.20 is: 473,017.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,010.80 : 480,016.20 = 315,345.20 : x
  2. Step 2: Convert to fraction form
    320,010.80/480,016.20 = 315,345.20/x
  3. Step 3: Cross multiply
    320,010.80x = 480,016.20 × 315,345.20
  4. Step 4: Simplify right side
    320,010.80x = 151,370,804,592.24
  5. Step 5: Solve for x
    x = 151,370,804,592.24/320,010.80
  6. Step 6: Final answer
    x = 473,017.80

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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.