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Finding the Fourth Proportional to 646,987.20, 970,250.40 and 292,171.20

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Solution

The fourth proportional to 646,987.20, 970,250.40 and 292,171.20 is: 438,152.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,987.20 : 970,250.40 = 292,171.20 : x
  2. Step 2: Convert to fraction form
    646,987.20/970,250.40 = 292,171.20/x
  3. Step 3: Cross multiply
    646,987.20x = 970,250.40 × 292,171.20
  4. Step 4: Simplify right side
    646,987.20x = 283,479,223,668.48
  5. Step 5: Solve for x
    x = 283,479,223,668.48/646,987.20
  6. Step 6: Final answer
    x = 438,152.75

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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.