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Finding the Fourth Proportional to 647,934.80, 972,339.60 and 422,746.70

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Solution

The fourth proportional to 647,934.80, 972,339.60 and 422,746.70 is: 634,405.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,934.80 : 972,339.60 = 422,746.70 : x
  2. Step 2: Convert to fraction form
    647,934.80/972,339.60 = 422,746.70/x
  3. Step 3: Cross multiply
    647,934.80x = 972,339.60 × 422,746.70
  4. Step 4: Simplify right side
    647,934.80x = 411,053,357,179.32
  5. Step 5: Solve for x
    x = 411,053,357,179.32/647,934.80
  6. Step 6: Final answer
    x = 634,405.43

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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.