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Finding the Fourth Proportional to 213,490.58, 320,235.87 and 55,717.67

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Solution

The fourth proportional to 213,490.58, 320,235.87 and 55,717.67 is: 83,576.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,490.58 : 320,235.87 = 55,717.67 : x
  2. Step 2: Convert to fraction form
    213,490.58/320,235.87 = 55,717.67/x
  3. Step 3: Cross multiply
    213,490.58x = 320,235.87 × 55,717.67
  4. Step 4: Simplify right side
    213,490.58x = 17,842,794,925.64
  5. Step 5: Solve for x
    x = 17,842,794,925.64/213,490.58
  6. Step 6: Final answer
    x = 83,576.50

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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.