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Finding the Fourth Proportional to 213,911.20, 320,866.80 and 176,586.40

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Solution

The fourth proportional to 213,911.20, 320,866.80 and 176,586.40 is: 264,879.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,911.20 : 320,866.80 = 176,586.40 : x
  2. Step 2: Convert to fraction form
    213,911.20/320,866.80 = 176,586.40/x
  3. Step 3: Cross multiply
    213,911.20x = 320,866.80 × 176,586.40
  4. Step 4: Simplify right side
    213,911.20x = 56,660,713,091.52
  5. Step 5: Solve for x
    x = 56,660,713,091.52/213,911.20
  6. Step 6: Final answer
    x = 264,879.60

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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.