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Finding the Fourth Proportional to 376,905.40, 565,358.10 and 219,311.80

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Solution

The fourth proportional to 376,905.40, 565,358.10 and 219,311.80 is: 328,967.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    376,905.40 : 565,358.10 = 219,311.80 : x
  2. Step 2: Convert to fraction form
    376,905.40/565,358.10 = 219,311.80/x
  3. Step 3: Cross multiply
    376,905.40x = 565,358.10 × 219,311.80
  4. Step 4: Simplify right side
    376,905.40x = 123,989,702,555.58
  5. Step 5: Solve for x
    x = 123,989,702,555.58/376,905.40
  6. Step 6: Final answer
    x = 328,967.70

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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.