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Finding the Fourth Proportional to 426,833.40, 639,407.70 and 216,622.20

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Solution

The fourth proportional to 426,833.40, 639,407.70 and 216,622.20 is: 324,505.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,833.40 : 639,407.70 = 216,622.20 : x
  2. Step 2: Convert to fraction form
    426,833.40/639,407.70 = 216,622.20/x
  3. Step 3: Cross multiply
    426,833.40x = 639,407.70 × 216,622.20
  4. Step 4: Simplify right side
    426,833.40x = 138,509,902,670.94
  5. Step 5: Solve for x
    x = 138,509,902,670.94/426,833.40
  6. Step 6: Final answer
    x = 324,505.77

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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.