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Finding the Fourth Proportional to 428,451.76, 642,044.10 and 404,487.70

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Solution

The fourth proportional to 428,451.76, 642,044.10 and 404,487.70 is: 606,133.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,451.76 : 642,044.10 = 404,487.70 : x
  2. Step 2: Convert to fraction form
    428,451.76/642,044.10 = 404,487.70/x
  3. Step 3: Cross multiply
    428,451.76x = 642,044.10 × 404,487.70
  4. Step 4: Simplify right side
    428,451.76x = 259,698,941,307.57
  5. Step 5: Solve for x
    x = 259,698,941,307.57/428,451.76
  6. Step 6: Final answer
    x = 606,133.45

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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.