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Finding the Fourth Proportional to 310,739.12, 428,555.40 and 262,576.40

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Solution

The fourth proportional to 310,739.12, 428,555.40 and 262,576.40 is: 362,131.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,739.12 : 428,555.40 = 262,576.40 : x
  2. Step 2: Convert to fraction form
    310,739.12/428,555.40 = 262,576.40/x
  3. Step 3: Cross multiply
    310,739.12x = 428,555.40 × 262,576.40
  4. Step 4: Simplify right side
    310,739.12x = 112,528,534,132.56
  5. Step 5: Solve for x
    x = 112,528,534,132.56/310,739.12
  6. Step 6: Final answer
    x = 362,131.86

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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.