Home / 428,618.03-643,312.50-229,108.95

Finding the Fourth Proportional to 428,618.03, 643,312.50 and 229,108.95

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Solution

The fourth proportional to 428,618.03, 643,312.50 and 229,108.95 is: 343,869.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,618.03 : 643,312.50 = 229,108.95 : x
  2. Step 2: Convert to fraction form
    428,618.03/643,312.50 = 229,108.95/x
  3. Step 3: Cross multiply
    428,618.03x = 643,312.50 × 229,108.95
  4. Step 4: Simplify right side
    428,618.03x = 147,388,650,251.33
  5. Step 5: Solve for x
    x = 147,388,650,251.33/428,618.03
  6. Step 6: Final answer
    x = 343,869.46

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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.