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Finding the Fourth Proportional to 628,739.49, 867,660.60 and 342,261.74

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Solution

The fourth proportional to 628,739.49, 867,660.60 and 342,261.74 is: 472,321.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,739.49 : 867,660.60 = 342,261.74 : x
  2. Step 2: Convert to fraction form
    628,739.49/867,660.60 = 342,261.74/x
  3. Step 3: Cross multiply
    628,739.49x = 867,660.60 × 342,261.74
  4. Step 4: Simplify right side
    628,739.49x = 296,967,022,347.14
  5. Step 5: Solve for x
    x = 296,967,022,347.14/628,739.49
  6. Step 6: Final answer
    x = 472,321.25

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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.