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Finding the Fourth Proportional to 219,311.80, 328,449.30 and 148,809.40

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Solution

The fourth proportional to 219,311.80, 328,449.30 and 148,809.40 is: 222,862.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,311.80 : 328,449.30 = 148,809.40 : x
  2. Step 2: Convert to fraction form
    219,311.80/328,449.30 = 148,809.40/x
  3. Step 3: Cross multiply
    219,311.80x = 328,449.30 × 148,809.40
  4. Step 4: Simplify right side
    219,311.80x = 48,876,343,263.42
  5. Step 5: Solve for x
    x = 48,876,343,263.42/219,311.80
  6. Step 6: Final answer
    x = 222,862.35

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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.