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Finding the Fourth Proportional to 647,501.40, 970,791.30 and 247,987.80

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Solution

The fourth proportional to 647,501.40, 970,791.30 and 247,987.80 is: 371,805.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,501.40 : 970,791.30 = 247,987.80 : x
  2. Step 2: Convert to fraction form
    647,501.40/970,791.30 = 247,987.80/x
  3. Step 3: Cross multiply
    647,501.40x = 970,791.30 × 247,987.80
  4. Step 4: Simplify right side
    647,501.40x = 240,744,398,746.14
  5. Step 5: Solve for x
    x = 240,744,398,746.14/647,501.40
  6. Step 6: Final answer
    x = 371,805.22

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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.