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Finding the Fourth Proportional to 287,421.12, 396,610.86 and 166,600.32

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Solution

The fourth proportional to 287,421.12, 396,610.86 and 166,600.32 is: 229,890.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,421.12 : 396,610.86 = 166,600.32 : x
  2. Step 2: Convert to fraction form
    287,421.12/396,610.86 = 166,600.32/x
  3. Step 3: Cross multiply
    287,421.12x = 396,610.86 × 166,600.32
  4. Step 4: Simplify right side
    287,421.12x = 66,075,496,191.48
  5. Step 5: Solve for x
    x = 66,075,496,191.48/287,421.12
  6. Step 6: Final answer
    x = 229,890.89

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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.