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Finding the Fourth Proportional to 430,422.80, 645,634.20 and 262,461.20

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Solution

The fourth proportional to 430,422.80, 645,634.20 and 262,461.20 is: 393,691.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,422.80 : 645,634.20 = 262,461.20 : x
  2. Step 2: Convert to fraction form
    430,422.80/645,634.20 = 262,461.20/x
  3. Step 3: Cross multiply
    430,422.80x = 645,634.20 × 262,461.20
  4. Step 4: Simplify right side
    430,422.80x = 169,453,926,893.04
  5. Step 5: Solve for x
    x = 169,453,926,893.04/430,422.80
  6. Step 6: Final answer
    x = 393,691.80

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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.