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Finding the Fourth Proportional to 647,555.20, 972,207.60 and 411,359.20

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Solution

The fourth proportional to 647,555.20, 972,207.60 and 411,359.20 is: 617,594.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,555.20 : 972,207.60 = 411,359.20 : x
  2. Step 2: Convert to fraction form
    647,555.20/972,207.60 = 411,359.20/x
  3. Step 3: Cross multiply
    647,555.20x = 972,207.60 × 411,359.20
  4. Step 4: Simplify right side
    647,555.20x = 399,926,540,569.92
  5. Step 5: Solve for x
    x = 399,926,540,569.92/647,555.20
  6. Step 6: Final answer
    x = 617,594.52

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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.