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Finding the Fourth Proportional to 213,345.54, 320,018.40 and 55,589.94

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Solution

The fourth proportional to 213,345.54, 320,018.40 and 55,589.94 is: 83,384.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,345.54 : 320,018.40 = 55,589.94 : x
  2. Step 2: Convert to fraction form
    213,345.54/320,018.40 = 55,589.94/x
  3. Step 3: Cross multiply
    213,345.54x = 320,018.40 × 55,589.94
  4. Step 4: Simplify right side
    213,345.54x = 17,789,803,654.90
  5. Step 5: Solve for x
    x = 17,789,803,654.90/213,345.54
  6. Step 6: Final answer
    x = 83,384.93

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1.5x scale

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.