Home / 646,919.40-970,724.70-291,988.20

Finding the Fourth Proportional to 646,919.40, 970,724.70 and 291,988.20

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Solution

The fourth proportional to 646,919.40, 970,724.70 and 291,988.20 is: 438,138.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,919.40 : 970,724.70 = 291,988.20 : x
  2. Step 2: Convert to fraction form
    646,919.40/970,724.70 = 291,988.20/x
  3. Step 3: Cross multiply
    646,919.40x = 970,724.70 × 291,988.20
  4. Step 4: Simplify right side
    646,919.40x = 283,440,157,848.54
  5. Step 5: Solve for x
    x = 283,440,157,848.54/646,919.40
  6. Step 6: Final answer
    x = 438,138.29

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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.