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Finding the Fourth Proportional to 212,885.80, 319,328.70 and 188,924.20

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Solution

The fourth proportional to 212,885.80, 319,328.70 and 188,924.20 is: 283,386.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,885.80 : 319,328.70 = 188,924.20 : x
  2. Step 2: Convert to fraction form
    212,885.80/319,328.70 = 188,924.20/x
  3. Step 3: Cross multiply
    212,885.80x = 319,328.70 × 188,924.20
  4. Step 4: Simplify right side
    212,885.80x = 60,328,919,184.54
  5. Step 5: Solve for x
    x = 60,328,919,184.54/212,885.80
  6. Step 6: Final answer
    x = 283,386.30

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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.