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Finding the Fourth Proportional to 238,216.48, 328,719.13 and 130,782.80

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Solution

The fourth proportional to 238,216.48, 328,719.13 and 130,782.80 is: 180,469.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,216.48 : 328,719.13 = 130,782.80 : x
  2. Step 2: Convert to fraction form
    238,216.48/328,719.13 = 130,782.80/x
  3. Step 3: Cross multiply
    238,216.48x = 328,719.13 × 130,782.80
  4. Step 4: Simplify right side
    238,216.48x = 42,990,808,729.80
  5. Step 5: Solve for x
    x = 42,990,808,729.80/238,216.48
  6. Step 6: Final answer
    x = 180,469.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.