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Finding the Fourth Proportional to 659,464.80, 989,456.40 and 260,037.60

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Solution

The fourth proportional to 659,464.80, 989,456.40 and 260,037.60 is: 390,158.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,464.80 : 989,456.40 = 260,037.60 : x
  2. Step 2: Convert to fraction form
    659,464.80/989,456.40 = 260,037.60/x
  3. Step 3: Cross multiply
    659,464.80x = 989,456.40 × 260,037.60
  4. Step 4: Simplify right side
    659,464.80x = 257,295,867,560.64
  5. Step 5: Solve for x
    x = 257,295,867,560.64/659,464.80
  6. Step 6: Final answer
    x = 390,158.61

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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.