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Finding the Fourth Proportional to 647,731.20, 970,284.60 and 366,920.40

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Solution

The fourth proportional to 647,731.20, 970,284.60 and 366,920.40 is: 549,637.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,731.20 : 970,284.60 = 366,920.40 : x
  2. Step 2: Convert to fraction form
    647,731.20/970,284.60 = 366,920.40/x
  3. Step 3: Cross multiply
    647,731.20x = 970,284.60 × 366,920.40
  4. Step 4: Simplify right side
    647,731.20x = 356,017,213,545.84
  5. Step 5: Solve for x
    x = 356,017,213,545.84/647,731.20
  6. Step 6: Final answer
    x = 549,637.28

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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.