Home / 646,921.40-970,727.70-291,990.20

Finding the Fourth Proportional to 646,921.40, 970,727.70 and 291,990.20

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Solution

The fourth proportional to 646,921.40, 970,727.70 and 291,990.20 is: 438,141.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,921.40 : 970,727.70 = 291,990.20 : x
  2. Step 2: Convert to fraction form
    646,921.40/970,727.70 = 291,990.20/x
  3. Step 3: Cross multiply
    646,921.40x = 970,727.70 × 291,990.20
  4. Step 4: Simplify right side
    646,921.40x = 283,442,975,268.54
  5. Step 5: Solve for x
    x = 283,442,975,268.54/646,921.40
  6. Step 6: Final answer
    x = 438,141.29

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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.