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Finding the Fourth Proportional to 418,868.20, 628,302.30 and 219,111.40

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Solution

The fourth proportional to 418,868.20, 628,302.30 and 219,111.40 is: 328,667.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,868.20 : 628,302.30 = 219,111.40 : x
  2. Step 2: Convert to fraction form
    418,868.20/628,302.30 = 219,111.40/x
  3. Step 3: Cross multiply
    418,868.20x = 628,302.30 × 219,111.40
  4. Step 4: Simplify right side
    418,868.20x = 137,668,196,576.22
  5. Step 5: Solve for x
    x = 137,668,196,576.22/418,868.20
  6. Step 6: Final answer
    x = 328,667.10

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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.