Home / 646,917.40-970,721.70-291,986.20

Finding the Fourth Proportional to 646,917.40, 970,721.70 and 291,986.20

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Solution

The fourth proportional to 646,917.40, 970,721.70 and 291,986.20 is: 438,135.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,917.40 : 970,721.70 = 291,986.20 : x
  2. Step 2: Convert to fraction form
    646,917.40/970,721.70 = 291,986.20/x
  3. Step 3: Cross multiply
    646,917.40x = 970,721.70 × 291,986.20
  4. Step 4: Simplify right side
    646,917.40x = 283,437,340,440.54
  5. Step 5: Solve for x
    x = 283,437,340,440.54/646,917.40
  6. Step 6: Final answer
    x = 438,135.29

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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.