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Finding the Fourth Proportional to 716,679.56, 988,993 and 394,359.52

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Solution

The fourth proportional to 716,679.56, 988,993 and 394,359.52 is: 544,202.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,679.56 : 988,993 = 394,359.52 : x
  2. Step 2: Convert to fraction form
    716,679.56/988,993 = 394,359.52/x
  3. Step 3: Cross multiply
    716,679.56x = 988,993 × 394,359.52
  4. Step 4: Simplify right side
    716,679.56x = 390,018,804,763.36
  5. Step 5: Solve for x
    x = 390,018,804,763.36/716,679.56
  6. Step 6: Final answer
    x = 544,202.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.